Light Blocking & Performance
Yes. OtterSpace blackout curtains are designed to block 100% of light, including light that usually leaks in around the edges and middle of curtains.
Other blackout curtains only block light through the fabric itself, which allows light to leak in around the edges. OtterSpace uses a patented edge-seal system that blocks light from the top, sides, bottom, and between panels, creating true total darkness.
Traditional blackout curtains rely on blackout fabric alone, which still allows light to leak in around the edges of the window. OtterSpace's award-winning blackout curtains combine our Blackout Core™ fabric with patented magnetic edge-sealing technology, blocking light at the top, sides, bottom, and between panels for true 100% blackout.
OtterSpace installs without drilling, tools, or permanent damage, works with or without curtain rods, and doesn’t require replacing your existing window décor. The modular system adapts to different window sizes and can be reused in other rooms, rentals, or while traveling.
OtterSpace blackout curtains are OEKO-TEX® certified, made with non-toxic materials, meeting the highest standard for textiles. This makes it a trusted choice for bedrooms, nurseries, kids’ rooms, and health-conscious homes.
Founded by a mother and PhD neuroscientist, OtterSpace was designed to balance real sleep outcomes with thoughtful design. Creating a darker, calmer sleep environment for the whole family, without sacrificing how your space looks.
OtterSpace has been recognized as one of USA Today’s Best New Products and a recipient of the Baby’s Best Award, reinforcing its reputation as a trusted,
category-leading blackout solution for anyone not wanting to compromise on sleep quality.
No! OtterSpace is a complete sleep system, engineered to create true 100% darkness through a patented edge-seal design. Unlike traditional blackout curtains, OtterSpace is designed to solve real sleep problems, especially for light-sensitive sleepers, parents, and shift workers.
Sleep Benefits & Health
By eliminating light exposure, OtterSpace supports deeper, more consistent sleep.
Customers often report:
- Fewer early-morning wakeups
- Longer naps
- Improved sleep quality for babies, kids, and adults
From a science perspective, darkness supports natural melatonin production and helps stabilize circadian rhythm for everyone, and is especially important for:
- Babies and young children
- Shift workers
- Travelers dealing with jet lag
- People sensitive to light or migraines
OtterSpace was created by a PhD neuroscientist founder with a focus on real sleep outcomes, while still being designed to look good in your space.
Yes. Many night shift workers use OtterSpace to create complete daytime darkness, which can make daytime sleep easier and more restorative.
OtterSpace Fabric
Absolutely! OtterSpace blackout curtains are OEKO-TEX® certified, meaning they are third-party tested to meet strict safety standards for textiles, including those used by babies and young children.
Our blackout fabric is made without:
- PVC or TPU
- PFAS (“forever chemicals”)
- Phthalates
- Formaldehyde
- Lead or other heavy metals
- Toxic off-gassing VOCs
OtterSpace fabric was developed to help support healthier indoor environments and calmer sleep spaces, which is why OtterSpace is commonly used in bedrooms, nurseries, kids’ rooms, and homes with sensitive sleepers.
Our system includes the OtterSpace Blackout Core™ curtain kit, a unique fabric designed to eliminate light. Not just through the fabric itself, but as part of a complete edge-sealing system. This is what sets OtterSpace apart from conventional blackout curtains and allows it to deliver true total darkness.
OtterSpace blackout curtains help with temperature control by blocking sunlight and reducing heat transfer. Our thick, high-quality blackout fabric adds an extra layer between the room and the window, which helps limit heat gain in the summer and heat loss in the winter.
Many customers share that their rooms feel cooler in the summer by blocking direct sun and warmer in the winter thanks to that added layer. This can make bedrooms more comfortable year-round and help reduce temperature swings. Especially in rooms with large windows or strong sun exposure.
Windows, Rooms & Use Cases
Yes. OtterSpace works with many window types, including:
- Standard and oversized windows
- Sliding doors
- Skylights
- Arched or irregular windows
Multiple panels can be combined for larger openings.
OtterSpace blackout curtains can be used in many different types of rooms, including:
- Bedrooms
- Nurseries and kids’ rooms
- Living rooms
- Home offices
- Hotels and rentals
They also provide privacy and help reduce heat from direct sunlight.
OtterSpace blackout curtains help soften outside noise, making rooms feel noticeably quieter. Epecially sounds like traffic or early-morning street activity.
Many customers mention that the weight and thickness of the panels help dampen outside sounds, like traffic, early-morning street noise, or neighborhood activity. They can make a room feel quieter and more comfortable, especially in urban settings.
Installation & Flexibility
Yes. OtterSpace blackout curtains are tool-free, no-drill, and renter-friendly.
The adhesive window plates are designed to remove cleanly without damaging walls or window frames. If you move, you can reuse the same panels/kits on a new window, making them ideal for apartments, dorms, rentals, and temporary setups.
Nope! Everything needed for installation is included in the kit. Our patented total blackout system can be installed in minutes.
Yes! The blackout panels and magnets are removable and reusable, making them popular for hotels, short-term rentals, and travel. When using the system for travel, you’ll need an additional set of non-damaging, removable adhesive (available here). Optional extra window plates are available if you’d like to keep your home setup installed while traveling.
OtterSpace blackout curtains attach using a patented magnetic edge-seal system designed to block light without drilling or permanent hardware.
Removable, non-damaging window plates are placed around the window frame using adhesive designed to hold through temperature changes. Magnets are clipped onto the curtain panel along the edges and magnetically connect to these blackout plates, creating a secure seal that blocks light where it typically leaks in.
The curtain panel itself can be:
- Hung with the included curtain rings on a standard or double curtain rod, or
- Installed without a rod
This flexible system allows OtterSpace to work with many window types while remaining renter-friendly and easy to remove or reuse.
OtterSpace blackout curtains can be used both horizontally or vertically, depending on how they are hung.
When hung on a curtain rod, panels should be used vertically, just like traditional curtains. When installed without a rod using the magnetic edge-seal system, panels can be used either vertically or horizontally, allowing you to adapt them to different window sizes and layouts.
This flexibility makes OtterSpace a good option for wide windows, sliding doors, and non-standard openings.
The curtain panels are modular, so multiple panels can be used side by side to block light across larger windows.
They can be cut to size, but we highly recommend leaving them as is.
Any extra fabric does not reduce blackout performance, and keeping the panels uncut allows you to reuse them for larger windows, future moves, or travel. Many customers find it helpful to have that extra flexibility over time.
If you prefer a closer fit to the size of your window, you can also fold in the sides or fold over the top when hanging without a curtain rod to better match your window size, without permanently altering the panel.
The magnetic blackout blocks are designed to seal the edges of the curtain to the window frame, which is where light usually leaks in.
Small, removable window plates are placed around the window frame using non-damaging adhesive. Magnets are reversibly clipped along the edges of the blackout curtain panel and attach magnetically to the window plates, pulling the fabric snug against the window edge and creating a tight light seal.
This system blocks light at the top, sides, bottom, and between panels, allowing OtterSpace to achieve true total darkness. Something other blackout curtains can’t do with fabric alone.
The magnets can also be repositioned or re-clipped, so the same panel can be adjusted for different window sizes or reused when you move or travel.
The standard OtterSpace installation uses removable, non-damaging adhesive, which works well for most customers because it holds securely through temperature changes while allowing the system to be removed or repositioned without permanent damage.
For those who prefer a more permanent setup, we will have screw-mounted hardware available to order separately in Spring 2026. If you’d like to be notified when this hardware becomes available or want help deciding what’s best for your space, feel free to reach out to us at hello@inotterspace.com
Sizing, Sets & Compatibility
Each OtterSpace blackout curtain panel kit is a complete blackout system, designed to seal out light.
Each set (panel) includes:
- 1x OtterSpace Blackout Core™ Panel
Our blackout fabric is engineered for true 100% blackout. Our LightLock™ Fabric is made with non-toxic materials, chosen to support healthier sleep environments. - 4 Magnetic Edge-Seal Blackout Blocks™
Designed to work with our Blackout Core™ Panel to block light where other blackout curtains fail - along the edges of the window and the center of curtain panels - 4 Removable, Non-Damaging Window Plates
These pair with the magnetic blocks to create a secure light seal without drilling or permanent hardware. - 6 Non-Damaging, Removable Adhesive Strips
Engineered to hold securely through temperature changes and humidity while removing cleanly. Ideal for rentals, nurseries, and flexible setups that need to move with you. - 14 Curtain Rings (For Curtain Rod Installation)
Allows the panel to hang on a standard or double curtain rod
Each Total Blackout Kit includes one 50" wide panel, available in 57", 78", or 91" lengths, designed to work on its own or behind standard curtain lengths.
Panels can be combined for larger windows. A detailed size guide is available to help you choose the right setup.
Absolutely! If you aren't using a curtain rod, you can use the blackout layer on its own by placing it behind your blinds, as shown in our portable blackout option. Just ensure you have about 1.5 inches of clearance behind your blinds for the blackout blocks to fit.
If you use a curtain rod, many customers find it easier to remove their blinds entirely (highly recommended if using a curtain rod), as they become unnecessary. However, if you prefer to keep the blinds, you can use the blackout layer in front of them, but it may be challenging to block out every bit of light, and you may see light leaks. We recommend removing the blinds for a simpler installation, smoother use, and optimal light-blocking capabilities.
Please reach out to us with questions and we can help guide you to the right solution for your window:
hello@inotterspace.com
Yes. Replacement or extra blackout block magnets, adhesive, and metal window plates are available separately.
The Total Blackout Kit can be used in so many ways!
- Use without a curtain rod: Attach the blackout panel directly to your window frame using our magnetic edge-seal system.
- Use with a curtain rod: Hang the blackout panel on a curtain rod using the included curtain rings. It works on its own or layered with our outer curtains or behind your existing decorative curtains as a blackout liner (we highly recommend removing blinds when hanging on a curtain rod for 100% blackout).
- Have curtains already?: Simply hang the blackout panel behind your current curtains on the same rod or on a double rod (we highly recommend removing blinds for complete blackout).
- Want a complete set?: Our Blackout Bundles include both the blackout panel and coordinating outer curtains, designed to layer together seamlessly on a curtain rod.
- Large or wide windows: Multiple blackout panels can be placed side-by-side to maintain full edge sealing and complete darkness.
- Need help choosing?: Check out our Size & Setup Guide to find the right panel length and number of panels for your space. Our team is always happy to help.
Ordering, Shipping & Policies
OtterSpace blackout curtains are sold directly through our website.
Yes! Many customers purchase them as gifts for new parents, shift workers, or frequent travelers.
We accept major credit cards, Shop Pay, PayPal, and eligible FSA/HSA payments.
We want you to feel confident in your purchase. That’s why OtterSpace offers a generous 30-day return period after delivery.
Our products are designed to deliver long-term sleep benefits, and we stand by their quality. If you need help or have questions during that time, we’re always happy to assist.
OtterSpace blackout curtains are made and packed with care. Most orders ship within 1-3 business days, and you’ll receive a shipping confirmation email with tracking information as soon as your order leaves our warehouse.
Affiliate Program
Yes. OtterSpace offers an affiliate program for creators, professionals, and partners. Details are available on our Affiliate page.
Product
Any curtain rod will work with our curtains (or none at all for travel or hanging the blackout layer behind blinds). You can use a single rod and hang both layers together or double curtain rod to hang the layers seperately.
Yes! Machine wash cold, gentle cycle. Hang to dry.
Each panel will cover a window that is 50” wide. Windows wider than 50” would require two panels to be sure all the light is blocked (and windows over 100” would require 3 panels, etc.). It is also important to consider that the panel needs to be pushed against the window. So allow at least an extra inch at the bottom of the panel.
Absolutely! If you don't have a curtain rod, you can use the blackout layer on its own by placing it behind your blinds, as shown in our portable blackout option. Just ensure you have about 1.5 inches of clearance behind your blinds for the blackout blocks to fit.
If you use a curtain rod, many customers find it easier to remove their blinds entirely, as they become unnecessary. However, if you prefer to keep the blinds, you can use the blackout layer in front of them, but it may be challenging to block out every bit of light, and you may see light leaks. We recommend removing the blinds for a simpler installation, smoother use, and optimal light-blocking capabilities.
We'd be happy to help find the perfect solution for your window. Reach out to us with questions at hello@inotterspace.com
Yup! The blackout layer has curtain rings that attach to the curtain rod in between the outer curtain's back tabs. They are completely separate. If you have a curtain that has back tabs or grommets you can order the blackout layer and place it behind your current curtain.
If you have a curtain with a rod pocket you can use a double curtain rod and hang them on the two separate rods.
Only if you want to block all light bleeds!
Our curtain also work well when used as "traditional" blackout curtains. However, they will block every bit of light from the edges if you use the blackout blocks.
You can use the curtains as you would any traditional curtain. Or check out our 'How-To'video to see how to incorporate the Blackout Blocks to block all light from the edges of the curtain.