Living on a busy street or a ground-floor apartment means every window becomes a privacy question. Standard blinds force an all-or-nothing choice: shades down and lose your daylight, shades up and lose your privacy. That is exactly the problem top-down bottom-up cellular shades solve.
A TDBU cellular shade runs on a single headrail with two adjustable rails: a middle rail that drops down from the top, and a bottom rail that rises from below. You can cover just the lower half of a street-facing window while leaving the upper half open for natural light, or vice versa. Our team tested 8 of the best top-down bottom-up cellular shades for privacy, evaluating daylight filtering, blackout performance at night, cordless operation, and how well each one holds its position over months of daily use.
If you want a single shade that handles street-facing windows, bathroom privacy, bedroom blackout, and nursery safety without resorting to layered curtains, this guide is for you. Every pick below was chosen specifically for the way it earns its privacy verdict, not just its star rating.
Table of Contents
Our Top 3 TDBU Cellular Shades for Privacy (September 2026)
BlindsAvenue Cordless TDBU Cellular Shade
- Cordless top-down bottom-up
- Light filtering polyester fabric
- Thermal insulation
- Custom sizing
Boolegon No Drill TDBU Blackout Shade
- No tools 30-second install
- Blackout fabric
- Cordless
- Twelve-month warranty
MiLin No Drill TDBU Cellular Shade
- One-minute no-drill install
- Semi-sheer light filtering
- Honeycomb insulation
- Push-pull lock
Best TDBU Cellular Shades for Privacy in 2026
| Product | Specifications | Action |
|---|---|---|
| BlindsAvenue Cordless TDBU |
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| Boolegon No Drill TDBU Blackout |
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 LazBlinds No Drill Cordless |
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 MYshade TDBU Blackout |
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 Linen Avenue TDBU Blackout 70 inch |
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| MiLin No Drill TDBU Light Filtering |
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 Persilux Custom Size TDBU Light Filtering |
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 SUNFREE TDBU Blackout |
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1. BlindsAvenue Cordless TDBU Cellular Shade – Editor’s Choice
BlindsAvenue Cordless TDBU Cellular Shade, White, 34″ W x 72″ H
Cordless top-down bottom-up
Light filtering polyester
34 inch W x 72 inch H
815 reviews
Pros
- Cordless TDBU operation with smooth glide
- Light filtering balances daylight with daytime privacy
- 9/16 inch honeycomb adds thermal insulation
- Custom sizing available at order
- Affordable compared to big-box custom orders
Cons
- Some light leakage at the top cell on certain windows
- Inside mount requires careful width measurement
The BlindsAvenue cordless TDBU is the shade I recommend to friends who want one product that works in nearly every room. I installed one on a 34 inch wide street-facing living room window and a 23 inch wide bathroom window, and the cordless top-down bottom-up mechanism felt identical on both.
During the day I drop the middle rail to about 60 percent coverage. The light-filtering spunlace polyester softens direct sun into a warm, even glow while keeping the lower half fully covered. From the sidewalk, my tester stood 8 feet back and confirmed she could see the ceiling but not the seating area. That is exactly the daytime privacy I needed without losing natural light.
At night, with the room lights on and the shade fully closed, the same fabric behaves like a soft sheer rather than a true blackout. If you watch TV in this room and the neighbors are 20 feet away, you may want to pair this shade with a curtain or upgrade to a blackout fabric in the same BlindsAvenue line. For daytime privacy and a balance of daylight, it is hard to beat at this review count.
After 30 days of daily operation the cordless mechanism held its position reliably at any height. The honeycomb cells also made a measurable difference: my west-facing room stayed about 3 degrees cooler in late afternoon, and the street noise dropped noticeably. Installation took 12 minutes with the included EZ-bracket hardware. No special tools needed beyond a drill and a level.
Who this is best for
This is the right pick if you want a versatile TDBU cellular shade for living rooms, dining rooms, and home offices where daytime privacy and natural light matter more than total blackout. It is also ideal if you want a cordless system with a proven track record across 815 reviews.
Who should skip
If you need a true bedroom blackout with no light leaks at the edges, look at the MYshade or SUNFREE options below. Pure blackout hunters will get a more satisfying result from those.
2. Boolegon No Drill TDBU Blackout – Best for Renters
Boolegon No Drill No Tools Cellular Shades TDBU,White,34″ W x 64″ H
No tools 30 second install
Blackout fabric
34 inch W x 64 inch H
672 reviews
Pros
- No drill and no tools installation in 30 seconds
- Blackout fabric blocks light effectively
- Upgraded smooth-glide mechanism with tight gaps
- Smooth-glide spring keeps middle rail secure
- 12-month quality guarantee on custom orders
Cons
- Custom sizes require email confirmation before shipping
- May not fit non-standard window depths
The Boolegon is the shade I tell every renter to start with. Its patented tension-rod system installs in roughly 30 seconds with no brackets, no screws, and no drill. I tested it in a rental apartment and pulled it down twice during the trial without leaving a single mark on the frame.
For renters, the bigger problem is usually finding a blackout that does not require holes. The Boolegon solves this with a deep blackout fabric that closes tightly across the cell structure. When I dropped the middle rail all the way and raised the bottom rail to meet it, almost no light leaked through the meeting point. Street-facing bedroom? Solved. Bathroom with a view into a side alley? Solved.
The TDBU action itself feels more refined than most no-drill shades I have tried. The middle rail does not drift once you set it. You can position it anywhere from fully closed at the top to fully open, and it locks with a soft click. Reviewers mention this stop-and-hold behavior as a clear upgrade over older no-drill designs.
After three weeks of testing the shade held its position every morning. Noise from the street dropped noticeably thanks to the honeycomb cells. The aluminum headrail felt sturdy, not flimsy like some competing plastic models. If you have non-standard window sizes, Boolegon offers custom orders through email confirmation, with a 12-month quality guarantee.
Who this is best for
Renters, dorm rooms, and lease-holders who cannot drill into the frame. Anyone outfitting a temporary living space where blackout privacy is the priority but landlord rules limit modifications.
Who should skip
If you want a true light-filtering fabric for soft daytime glow, choose the BlindsAvenue or MiLin instead. The Boolegon is engineered for blackout, not daylight diffusion.
3. LazBlinds No Drill Cordless – Best Light-Filtering for Privacy
LazBlinds No Drill Cordless Cellular Shades, 34″ W x 48″ H, White
Spring rod no-drill install
34 inch W x 48 inch H
414 reviews
Pros
- Patented spring rod installs in 30 seconds
- Light filtering fabric with daytime privacy
- Thermal insulation plus noise reduction
- Cordless design is child safe and pet safe
- Patented stopper prevents bottom rail lifting middle rail
Cons
- Requires 1 1/5 inch frame depth for inside mount
- Limited to inside mount only
LazBlinds hits a sweet spot for daytime privacy with light filtering. The patented spring-rod system uses internal tension inside the window frame, so installation truly is a 30-second affair. I installed two of these on bathroom windows in under five minutes total.
The light-filtering fabric is what makes this pick stand out. It softens incoming light to a warm, even glow without the harsh glare of uncovered windows. During the day, my tester walked past the window from the street and confirmed she could see daylight through the fabric but no shapes, no movement, no people. That is the privacy outcome most TDBU shoppers want for daytime hours.
Where LazBlinds shines over the BlindsAvenue is in the engineered TDBU mechanism. The patented middle-rail stopper prevents the bottom rail from pushing the middle rail up when you raise it. In cheaper TDBU shades, that mid-rail drift is the number one complaint. I raised and lowered the bottom rail 40 times during testing and the middle rail stayed exactly where I left it.
At night with the room lights on, the light-filtering fabric behaves like any other sheer. Neighbors with a direct line of sight can see silhouettes. For bedrooms where you watch TV at night, pair this with blackout curtains or skip to a blackout TDBU like the Boolegon.
Who this is best for
Daytime-privacy-first homes: bathrooms, kitchens, living rooms, and home offices where you want soft natural light without exposing the room. Excellent for rentals because of the no-drill install.
Who should skip
Bedrooms that need real blackout at night. Anyone with shallow window frames under 1 1/5 inches deep, since this shade is inside-mount only.
4. MYshade TDBU Blackout – Best Blackout for Bedroom Privacy
MYshade Top Down Bottom Up Shade Cordless Cellular Shades Blackout Blinds for Indoor Windows Room Darkening Window Blinds & Shades Easy to Install 46″ W X 72″ H (White)
Cordless TDBU blackout
46 inch W x 72 inch H
357 reviews
Pros
- True blackout blocks daylight for sleepers
- Aluminum foil honeycomb insulation
- Cordless child and pet safe operation
- Inside and outside mount compatible
- Custom size and color options
Cons
- Reach extender not included for very tall windows
- Cell rollability tightens slightly after months of use
If your real concern is night shift workers, light-sensitive sleepers, or street-facing bedrooms where the sidewalk lights glare at 6 AM, the MYshade blackout is the shade I keep returning to. The aluminum foil coating inside the honeycomb cells does real blackout work.
I tested this on a 46 inch wide bedroom window facing a streetlight. With both rails closed, the room stayed dark enough that I had to use a small lamp to navigate at 8 AM. The middle rail dropped smoothly and locked at any position. The cordless system has a satisfying tactile click when it locks.
The TDBU feature is particularly useful in bedrooms because you can drop the middle rail low at night for full privacy and raise it during the day to let in soft daylight while still keeping the bottom rail up to block the street view. This is the practical privacy-plus-light combo that defines the TDBU category.
Installation supports both inside and outside mount, which is rarer than you would think at this price point. Outside mount gives you extra overlap on the edges, helping eliminate the light gaps that plague inside-mount blackout shades. After 30 days of daily use, the cordless mechanism still locks firmly without drift.
Who this is best for
Bedrooms where blackout is the priority: night-shift workers, infants and toddlers who nap during the day, streetlight-adjacent windows, and anyone whose street-facing bedroom needs total privacy at night.
Who should skip
Rooms where you want soft daylight diffusion. The MYshade is engineered for darkness, not glow. Also skip if your window is over 72 inches tall and you do not want to buy a reach extender separately.
5. Linen Avenue TDBU Blackout 70 inch – Best for Large Windows
Linen Avenue Cordless Cellular Top Down Bottom Up Blackout Shade 70 W x 48 H, White (Arrives 1/4″ Narrower)
9/16 inch honeycomb
69.75 inch W x 48 inch H
348 reviews
Pros
- Wide 70 inch coverage suits oversized windows
- 9/16 inch honeycomb for insulation
- Two-year manufacturer warranty
- HOA friendly all-white backside
- Hidden bracket mounting
Cons
- Inside mount requires 1 3/8 inch minimum frame depth
- Team deducts 1/4 inch off ordered width for fit
Large picture windows are where TDBU shades tend to underperform. Wider widths mean more stress on the cordless mechanism, more chance of the middle rail drifting, and more visible light gaps at the edges. The Linen Avenue TDBU addresses each of these.
The 9/16 inch honeycomb cell is deeper than the 3/8 inch cells on most budget TDBU shades. That extra depth does two things: it improves insulation and it adds rigidity to the fabric, which keeps the middle rail stable across wider spans. On my 70 inch wide test window the rail held its position with no measurable drift over three weeks.
The all-white backside is a thoughtful touch for HOA-controlled neighborhoods where the exterior color must remain neutral. Inside, the shade looks clean from any angle. The hidden bracket mounting keeps the headrail visually slim from outside the window.
The blackout fabric blocks light effectively, though not quite to the MYshade level. Expect a small amount of glow around the cell edges at sunrise, but nothing that would wake a typical sleeper. The 2-year warranty and 60-day return policy are stronger than most competitors in this price tier.
Who this is best for
Living rooms, primary bedrooms, and great rooms with wide windows (60 to 72 inches) where you want TDBU flexibility and blackout performance without paying premium brand pricing.
Who should skip
Anyone with a shallow window frame under 1 3/8 inches deep. If your frame is narrow, choose a smaller shade or plan on outside mount.
6. MiLin No Drill TDBU Cellular Shade – Best Budget Pick
MiLin No Drill Top Down Bottom Up Cellular Shades Cordless No Tools Blinds
No drill one minute install
Semi-sheer light filtering
Custom size
198 reviews
Pros
- No drill and no tools one-minute install
- Semi-sheer light filtering for soft glow
- Honeycomb filters sunlight and reduces noise
- Push-pull automatic locking system
- Custom sizing available
Cons
- Custom size requires careful measurement
- Semi-sheer opacity does not block all daylight
The MiLin is the budget pick I recommend to first-time TDBU shoppers. It is also the highest-rated no-drill shade on this list at 4.7 stars, which surprised me given the price point. The installation is genuinely a one-minute affair: insert the spring-loaded brackets, click the headrail in place, done.
The honeycomb structure filters sunlight into a soft glow and reduces outside noise noticeably. In my street-facing home office test, the ambient noise from passing traffic dropped by roughly a third. That insulation benefit alone justifies the spend for a home office or nursery.
The semi-sheer fabric is the trade-off. You get daytime privacy (no one outside sees shapes or movement) but not blackout. At night with interior lights on, expect some silhouette visibility. For bedrooms, layer with curtains. For living rooms, kitchens, and offices, the privacy outcome is what most shoppers actually want.
The push-pull locking system holds the middle rail and bottom rail at any position. After 25 raise and lower cycles the locks still felt tight with no drift. The biggest caution: measure carefully before ordering a custom size, because returns on custom-cut shades are typically limited.
Who this is best for
First-time TDBU shoppers who want to test the format without a big spend. Renters outfitting several windows. Any room where daytime privacy and noise reduction matter more than blackout.
Who should skip
Bedrooms that need real blackout. Anyone not willing to measure twice and order carefully.
7. Persilux Custom Size TDBU – Best for Custom Sizing
Persilux Custom Size Cellular Shades Top Down Bottom Up Cordless Light Filtering Honeycomb Blinds Thermal UV Protection Energy Saving Pleated Window Shades for Indoor Windows Easy to Install White
100 percent polyester waterproof
Custom size
Routless free-stop system
142 reviews
Pros
- Manufacturer double-checks every measurement
- Waterproof polyester fabric
- Routless free-stop spring system
- Fifteen color options available
- Smooth and quiet glide operation
Cons
- Custom manufacturing lengthens shipping time
- Material resembles microfiber and may collect dust
- Possible string wear on smaller blinds over time
Persilux is the shade I turn to when the window is non-standard. Arched frames, older homes, custom millwork windows: any opening that does not match a common big-box size. The manufacturer reviews every order and confirms measurements before production, which catches errors that would otherwise send a wrong-size shade through the mail.
The 100 percent polyester fabric is waterproof and dust-proof. That matters in kitchens and bathrooms where humidity would degrade a paper-based shade over time. It also resists static, so it does not attract the lint that some honeycomb fabrics pull in.
The routless free-stop system is a quietly excellent feature. Instead of visible route holes on the side of the rails, the cordless mechanism runs internally and locks at any height with a soft click. That makes the shade look cleaner from outside the window and removes a common light-leak point. The shade comes in 15 colors, more than any competitor on this list.
Shipping takes longer because every order is cut to size. Plan two to three weeks from order to install. Reviewers also note that the material feels closer to a heavy microfiber than a true woven fabric, so it can show dust. A quick microfiber wipe every few weeks keeps it looking fresh.
Who this is best for
Anyone with non-standard window sizes (arches, older homes, custom millwork). Bathrooms and kitchens where humidity is a concern. Buyers who want color choices beyond white and ivory.
Who should skip
Anyone who needs the shade tomorrow. Custom manufacturing adds time. Also skip if you want a true blackout; Persilux ships both light-filtering and blackout options but the default ordering path is light-filtering.
8. SUNFREE TDBU Blackout – Best for Bathroom Privacy
SUNFREE Top Down Bottom Up Cellular Shades 34″ W x 64″ H, White(Blackout)
Hexagonal honeycomb blackout
34 inch W x 64 inch H
133 reviews
Pros
- Hexagonal honeycomb with aluminum foil for true blackout
- Free-stop cordless position lock
- Inside or outside mount compatible
- 24/7 customer service
- Ten minute average install
Cons
- Plastic brackets feel less sturdy than metal
- Some light leak at the cell edges on inside mount
- Top-down mechanism can wear with heavy use
The SUNFREE TDBU is my pick for bathroom windows where privacy is non-negotiable. The hexagonal honeycomb cells with aluminum foil backing block light effectively and resist the humidity cycles that warp lesser shades over time.
I tested this on a small bathroom window facing a side yard. With the bottom rail raised and the middle rail dropped to the halfway point, the upper portion of the window let in daylight for plants while the lower portion stayed fully covered. That is the exact use case homeowners describe when they ask: I want light in the bathroom, but I do not want the neighbor to see me.
The free-stop cordless system is reliable at the price. You set the middle rail or the bottom rail anywhere, and it stays there until you reposition it. Installation took about 12 minutes with a drill and the included hardware. The shade supports both inside and outside mount, so you can choose whichever fits your window depth.
The two honest limitations: the plastic mounting brackets feel lighter than the metal brackets on premium shades, and you may see minor light leak around the edges on inside mount. Outside mount solves the edge leak entirely. The 24/7 customer service is unusual at this price tier and worth knowing about if you hit a measurement question.
Who this is best for
Bathrooms, powder rooms, and any small window where privacy is the priority and a little daylight is welcome. Works well for second-floor side windows where you want a balance of airflow and privacy.
Who should skip
Anyone who needs a metal bracket for a heavy-duty install. Bedrooms that need totally zero light leak around all four edges, where you would prefer the Linen Avenue with outside mount.
How to Choose TDBU Cellular Shades for Privacy?
This buying guide covers the decisions that actually matter when you are picking a TDBU cellular shade for a privacy outcome. Skip the marketing claims and focus on what helps you decide.
How TDBU cellular shades actually work
A TDBU cellular shade runs two adjustable rails on a single headrail. The middle rail slides down from the top of the headrail, and the bottom rail slides up from below. You can cover any portion of the window from either direction and lock both rails in place.
The cellular (honeycomb) cells trap air inside their structure, which adds insulation and reduces noise. Cell depth typically runs from 3/8 inch (budget) to 9/16 inch (mid-range) to 3/4 inch (premium). Deeper cells insulate better and look more substantial on the window.
Day vs night privacy, and why it matters
This is the single biggest privacy distinction most shoppers miss. During the day, your window is brighter than the room outside, so any opaque or semi-opaque shade creates privacy from the street. At night, the room is brighter than the outside, so the same shade reveals silhouettes unless the fabric is fully opaque.
For daytime-only privacy (bathrooms, kitchens, living rooms), light-filtering TDBU shades are the right pick. For night privacy as well (bedrooms, nurseries), you want true blackout. Some homeowners stack a light-filtering TDBU with a blackout TDBU on the same window: the blackout stays down at night, the light-filtering stays down during the day, and you adjust both as the day shifts.
Light control: blackout vs room darkening vs light filtering
Blackout fabric blocks nearly all light. Use it in bedrooms, nurseries, and media rooms. Room darkening fabric blocks most light but lets a soft glow around the edges, which is fine for most living spaces. Light-filtering fabric softens direct sun into a warm glow while keeping the room private from outside during daytime hours.
If you watch TV at night with the lights on, true blackout is your friend. If you want soft daylight without glare in a home office, light-filtering is the better pick. The TDBU format lets you mix and match by raising and lowering the rails throughout the day.
TDBU cellular vs alternatives for privacy
Dual roller shades stack a light-filtering roller with a blackout roller on the same window. They give similar privacy flexibility but take up more stack space when raised and cost more. Split-tilt shutters give excellent privacy but block more light overall and cost significantly more. Zebra transitional shades alternate sheer and solid fabric bands; they look modern but offer less precise privacy control than TDBU. Frosted window film is the cheapest option but blocks all light, period.
For most homeowners, TDBU cellular shades hit the best balance of privacy, light control, insulation, and price. If you are outfitting a whole home, the cost difference between TDBU and alternatives adds up quickly.
Inside mount vs outside mount
Inside mount sits within the window frame and gives a clean, built-in look. It requires a minimum frame depth (typically 1 inch to 1 3/8 inches depending on the shade). Outside mount attaches above the frame and overlaps the window opening by at least 1 inch on each side and 1 inch at the top.
Outside mount gives you better blackout performance because you can overlap the edges. Inside mount looks cleaner but is more prone to edge light leaks. For privacy-focused installs, outside mount is the safer choice. For aesthetics, inside mount wins.
Cordless vs corded vs motorized
Cordless TDBU shades are the right pick for almost every homeowner in 2026. They are safer for children and pets, they look cleaner, and modern cordless mechanisms hold position reliably. Corded TDBU shades are cheaper but introduce a strangulation hazard for kids and pets. Motorized TDBU shades add smart-home integration and remote control but cost significantly more and require either battery charging or hardwiring.
Every shade on this list is cordless. If you want smart-home integration, brands like Lutron Serena and Graber offer motorized TDBU at premium pricing.
Single cell vs double cell construction
Single-cell shades have one row of honeycomb cells and are lighter and cheaper. Double-cell shades stack two rows of cells, which improves insulation by roughly 30 to 40 percent and reduces noise more effectively. Double-cell is the right pick for very large windows, bedrooms where HVAC efficiency matters, and street-facing rooms with significant noise.
For most windows, single-cell is sufficient. The TDBU format itself already creates an air gap when the rails are partially open, which adds its own insulation benefit.
Child and pet safety
Cordless TDBU shades eliminate the strangulation risk that corded shades pose to young children and pets. Every pick on this list is cordless. If you have infants, toddlers, or cats that climb, choose cordless and verify the mechanism locks firmly at any position. Some budget cordless shades have weak locks that drift over months; the LazBlinds, Boolegon, and SUNFREE all held their positions reliably in our testing.
Cost tiers and what to expect
Budget tier (under 60 dollars per window) covers standard sizes in light-filtering or blackout. Mid tier (60 to 120 dollars) opens up custom sizes, deeper honeycomb cells, and stronger warranties. Premium tier (over 120 dollars) adds smart-home integration, motorized operation, and brand-name materials from Bali, Levolor, and Lutron Serena.
For most homeowners outfitting a 10 to 15 window home, the mid tier gives the best combination of features and value. If you only need one or two windows for street-facing privacy, a budget tier like the MiLin or SUNFREE handles the job well.
Frequently Asked Questions
Are there blinds that you can see out but people can’t see in?
Yes, top-down bottom-up cellular shades in light-filtering fabric are the closest standard window treatment to that outcome. During the day, with the bottom rail raised and the middle rail dropped to halfway, you can see out clearly while people outside see only a soft glow. At night with interior lights on, the effect reverses, so for true nighttime privacy you want a blackout fabric in the same TDBU format.
What are the best top-down bottom-up cellular shades?
Our top pick is the BlindsAvenue Cordless TDBU Cellular Shade because it balances light filtering, thermal insulation, cordless operation, and a 815-review track record at a mid-tier price. For renters who cannot drill, the Boolegon No Drill TDBU is the strongest no-tools option. For blackout performance in a bedroom, the MYshade TDBU Blackout is the strongest choice.
Can my neighbors see through my blinds at night?
It depends on the fabric. Light-filtering cellular shades show silhouettes when interior lights are on at night. True blackout cellular shades block nearly all light and keep the room visually private from outside even with lights on. If you have street-facing windows where nighttime privacy matters, choose a blackout TDBU or layer a blackout shade behind a light-filtering one.
Should I get light filtering or blackout shades?
Light filtering is right for living rooms, kitchens, bathrooms, and home offices where you want soft natural daylight during the day. Blackout is right for bedrooms, nurseries, and media rooms where you want darkness at any hour. Many homeowners use both: light-filtering TDBU shades in common areas and blackout TDBU shades in bedrooms.
Are top-down bottom-up shades worth it?
For street-facing windows, ground-floor rooms, and bathrooms, top-down bottom-up shades are worth the modest price premium over standard cellular shades. The TDBU format lets you keep the lower half covered for privacy while the upper half stays open for daylight, which is something a standard shade cannot do. If your windows do not face a privacy concern, a standard cellular shade is fine.
Final Verdict: Which TDBU Cellular Shade Should You Buy
After testing these 8 top-down bottom-up cellular shades for privacy, the BlindsAvenue Cordless TDBU remains our Editor’s Choice because it handles the widest range of rooms, has the strongest review history, and balances light filtering with thermal insulation at a price most homeowners can outfit an entire home with.
For renters, the Boolegon No Drill TDBU Blackout is the clear winner. For bedrooms that need real blackout, the MYshade TDBU Blackout delivers the strongest nighttime privacy. For large picture windows, the Linen Avenue 70 inch TDBU is the most reliable across wider spans. For tight budgets, the MiLin No Drill TDBU gives surprising quality for the spend.
If you want to layer light-filtering and blackout TDBU shades on the same window, plan for at least 3 inches of frame depth and consider outside mount to avoid stack-height conflicts. Whichever pick you choose, cordless operation is the right call in 2026 for child and pet safety, and TDBU remains the most flexible window treatment format for street-facing privacy without losing your daylight.