🌙 Blocks 100% of Light — finally sleep through sunrise, car lights, and street lamps
✂️ Fits Any Window — cut to size in seconds, no measuring tape needed
⚡ Up in 5 Minutes — no drill, no damage, no landlord drama
🏠 Complete Privacy — neighbors can't see in, day or night
BUNDLE & SAVE
Free Installation Kit included with your order!
Couldn't load pickup availability
American express payment method
Apple pay payment method
Diners club payment method
Discover payment method
Google pay payment method
Jcb payment method
Master payment method
Visa payment method
Want it by - ?
ORDER WITHIN
2 HOURS
14 MINUTES
Blackly™ Total Blackout System
+789 Reviews
Regular price
$29.99
Regular price
$29.99
Sale price
$39.99
Unit price/ per
SAVE
25%
Sold out
I work night shifts at the hospital and sleeping during the day was a nightmare. Tried everything — eye masks, regular curtains, nothing worked. Installed Blackly in literally 5 minutes and my room went completely dark. I'm finally getting real sleep before my shifts. This thing is no joke."
Sarah Mitchell
Our newborn was waking up every time the sun hit the nursery window. My wife found Blackly at 2am and we had it up by morning. No more early wake-ups, no drilling holes in the walls. Wish we had found this 3 months ago honestly.
James Reynolds
Living in NYC with a street lamp directly outside my window was destroying my sleep. Landlord won't let me drill anything so curtains were never an option. Blackly solved both problems. Room is pitch black now and no damage to the walls. Worth every penny.
Nicole Williams
info
Details
BLACKLY isn't just a curtain — it's a complete light elimination system built for people who need real darkness to sleep.
-Made from high-density 420D Oxford fabric with a reflective silver backing that blocks 100% of outside light while keeping your room cooler and quieter. 🌑
-No drilling. No damage. No stress. Strong magnetic fixings and adhesive Velcro strips lock the panel in place against any window frame in under 5 minutes. ⚡
-Lightweight, foldable, and built to go anywhere — perfect for bedrooms, rentals, hotels, and travel. 🧳
straighten
Will it fit?
Short answer — yes. Long answer — here's why.
BLACKLY comes in 3 sizes that cover everything from a small bedroom window to a large sliding door. Measure your window, pick the size just a bit bigger, and trim it to a perfect fit with the included cutter.
📏 55" x 39" — small to medium bedroom windows
📏 55" x 79" — large windows and living rooms
📏 55" x 118" — sliding doors and floor-to-ceiling windows
No guesswork. No hardware. Just measure, cut, done.
window_closed
Window Compatibility
BLACKLY works with virtually every window type found in U.S. homes.
✅ Rectangular & square windows ✅ Casement windows ✅ Sliding windows & doors ✅ Fixed windows ✅ Bay windows ✅ Rental & apartment windows
If it has a frame, BLACKLY fits it. No permanent fixtures, no damage, no landlord issues.
box
What's included?
No trips to the hardware store. No missing pieces. Everything you need to go from bright room to complete darkness arrives in one package.
I wasn’t expecting much but these are actually really good. my room stays dark even during the day now. didn’t think it would make this much difference tbh
124
16 Comments
Like
Comment
Share
Blackly
Love this, Jessica — really glad it’s making a difference for you. 🙌
9d agoLikeReply
Taylor M.
same here, didn’t think it would make such a difference but I’m sleeping way better now
8d agoLikeReply
Chris H.
5d ago
honestly didn’t realize how exposed my room felt before. now it’s actually dark and way more private
65
8 Comments
Like
Comment
Share
Blackly
That’s a big difference, Chris — glad you’re feeling both.
5d agoLikeReply
Amanda K.
11d ago
put these up last weekend and my room stays way darker in the mornings now. didn’t realize how much light was coming in before
189
27 Comments
Like
Comment
Share
Blackly
That’s usually when it clicks for people — glad you noticed it, Amanda.🙌
11d agoLikeReply
Megan C.
14d ago
woke up around 9 and my room was still dim… that never used to happen. kinda impressed
58
7 Comments
Like
Comment
Share
Blackly
That’s actually a really good sign, Megan — appreciate you sharing that.
14d agoLikeReply
Hannah S.
I’ve been waking up way later without even trying
3d agoLikeReply
Leo G.
7d ago
got mine quicker than I expected. put them up the same day and yeah… they actually work
23
3 Comments
Like
Comment
Share
Blackly
Love that, Leo — glad everything went smooth. 🙌
7d agoLikeReply
 
 
How Does It
Work?
step 1
Measure your window and mark where the blackout panel needs to be cut. Leave a small extra margin around the edges to ensure complete light blocking.
Step 2
Trim the blackout panel to size using the included cutter, ensuring a clean and precise fit.
Step 3
Peel off the adhesive backing and attach the Velcro and magnetic strips to the window frame. Repeat the same process on the blackout panel to ensure a tight, light-blocking seal.
Step 4
Secure the blackout panel in place by attaching it to the Velcro and magnetic strips, ensuring a firm seal around the edges.
Blackout Complete
Your room is now fully dark — ready for deeper, uninterrupted sleep.
100% LIGHT BLOCKING
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
+FREE INSTALLATION KIT
The Future Is Blackout Room
0%
94%
Better Sleep Quality 🌙
Reported deeper, more uninterrupted sleep after blocking all outside light.
0%
92%
Faster Installation Experience ⏱️
Said BLACKLY was easier to install compared to traditional blackout curtains.
0%
89%
Noticed Immediate Light Reduction 🌑
Noticed a dramatic difference in room darkness within minutes of installation.
📊 Results based on customer feedback Percentages reflect responses from customers after using BLACKLY in their daily routine.
Turn a bright room into complete darkness with a simple, low-cost blackout solution.
Before
After
 
 
 
 
FREQUENTLY ASKED
QUESTIONS
contact_support
❓ Does it really block 100% of the light?
No "mostly dark," no "pretty dark" — we mean pitch black. BLACKLY's high-density fabric with reflective silver backing eliminates every trace of light, including sunrise, street lamps, and car headlights. When it's installed correctly, your room goes completely dark. That's the whole point.
contact_support
❓ I rent my apartment. Will my landlord have a problem with this?
Zero risk. BLACKLY uses adhesive Velcro that removes completely clean — no holes, no marks, no damage. We've had customers in NYC apartments use it for over a year and remove it without a trace.
contact_support
❓ What if I measure wrong or cut too much?
Order a size larger than your window — that's the rule. You can always cut more, but you can't add material back. If you're unsure.
contact_support
❓ I work night shifts. Will this actually let me sleep through a full day?
That's exactly who we built this for. Once installed, your room becomes pitch black regardless of what time it is outside. Sunrise, noon sun, whatever — your room stays dark until you decide otherwise.
contact_support
❓ I have an irregular shaped window. Will it still work?
As long as your window has a frame to attach the Velcro strips to, yes. BLACKLY has been installed on arched windows, angled windows, and even skylights. If you have a unique window shape, reach out before ordering and we'll help.
INSTALLS IN MINUTES
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
INSTALLS IN MINUTES
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
INSTALLS IN MINUTES
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
INSTALLS IN MINUTES
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
INSTALLS IN MINUTES
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
INSTALLS IN MINUTES
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
INSTALLS IN MINUTES
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
INSTALLS IN MINUTES
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
INSTALLS IN MINUTES
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
INSTALLS IN MINUTES
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
INSTALLS IN MINUTES
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
INSTALLS IN MINUTES
+FREE INSTALLATION KIT
100% LIGHT BLOCKING
Happy Sleepers
Customer Reviews
Overall rating: 4.8 / 5 from 789 reviews.
Finally found something that actually works. I've tried blackout curtains before but light always got through the sides. Blackly sealed everything completely — my room is pitch black now even at noon. Took me less than 10 minutes to install and it fits perfectly behind my existing curtains
Works exactly as advertised. Room goes completely dark, no light coming through the sides or top. I work night shifts and this has been a game changer for sleeping during the day. Super easy to install, had it up in minutes.
I was skeptical at first but this thing really works. Got it for my bedroom window and my room is completely dark now. The installation was straightforward and everything you need comes in the package. Best $30 I've spent in a while.
Used it on my bedroom door to block the hallway light at night. Works perfectly — zero light coming through. My kids finally sleep through the night without waking up from the hall light. Didn't damage anything and took 5 minutes to put up.
I live in an apartment with massive windows and the morning sun was destroying my sleep. Blackly fixed it completely. Looks clean, blocks everything, and my landlord would never know it's there. Honestly didn't expect it to work this well.
I live in an apartment with strong street lights outside and this solved the problem completely. Fits perfectly once trimmed. Very satisfied with the purchase.
Super easy to install, took me less than 15 minutes. I like that it’s removable and doesn’t require drilling. Blocks light better than my old curtains.
This blackout cover is a game changer. I work night shifts and finally can sleep during the day. The fabric feels thick and durable, not cheap at all. Customer support was also very helpful when I had a sizing question.
I've bought three different blackout solutions in the past two years — curtains, stick-on film, thermal blinds. None of them did what Blackly did in 5 minutes. The magnetic fixings keep it sealed on all sides and there are zero light gaps. I'm genuinely annoyed I didn't find this sooner.
I work night shifts and sleeping during the day was impossible with all the light coming through my windows. Tried cheap curtains, tried eye masks, nothing worked long term. Blackly was the first thing that actually solved the problem completely. My room is dark at any hour and I'm finally getting real sleep before my shifts. Worth every penny and then some.
I work night shifts and sleeping during the day was impossible with all the light coming through my windows. Tried cheap curtains, tried eye masks, nothing worked long term. Blackly was the first thing that actually solved the problem completely. My room is dark at any hour and I'm finally getting real sleep before my shifts. Worth every penny and then some.
Blackly
Love this, Jessica — really glad it’s making a difference for you. 🙌