Adaptive coolingUltra lightweight proprietary lyocell based Outlast® lining fabric for dual heat management technologies.Silk Sleep Mask
Free US shipping & 30-night trial
Overview
Features & Benefits

Adaptive cooling
Ultra lightweight proprietary lyocell based Outlast® lining fabric for dual heat management technologies.
One sizes fits
One sizes fits all thanks to an elastic headband.
OEKO
OEKO-TEX® STANDARD 100 Certified Technology. Certification Number: 05.0.9235
Materials, Fabric Technology & Care
What it is made from
- 22 momme weight 100% pure mulberry Silk
- 100% Tencel® lyocell lining with Outlast® technology coating
- 100% polyester fiberfill
How the fabric works
- Ultra lightweight proprietary lyocell based Outlast® lining fabric for dual heat management technologies.
- One sizes fits all thanks to an elastic headband.
- OEKO-TEX® STANDARD 100 Certified Technology. Certification Number: 05.0.9235
- Reduces moisture buildup
How to care for it
Basic: Hand wash with cold water using a pH neutral liquid detergent and/or fabric softner. Line dry. Do not tumble dry or iron.
Sizing & Dimensions
- One size fits most
Shipping, Returns & Price Match
Free US ground shipping — orders typically ship within 24 business hours from Denver, Colorado. Try it for 30 nights; if you don't love it, return it for a full refund. If it goes on a deeper sale within 30 days, we'll refund the difference.
Made for cooler, deeper sleep
Why you'll love it
Adaptive coolingUltra lightweight proprietary lyocell based Outlast® lining fabric for dual heat management technologies.
Inside the product
Materials chosen for cooler, more comfortable sleep.
From what touches your skin to how it performs overnight, every detail below comes directly from this product’s materials and care information.
Materials
- 22 momme weight 100% pure mulberry Silk
- 100% Tencel® lyocell lining with Outlast® technology coating
- 100% polyester fiberfill
Technology & benefits
- Ultra lightweight proprietary lyocell based Outlast® lining fabric for dual heat management technologies.
- One sizes fits all thanks to an elastic headband.
- OEKO-TEX® STANDARD 100 Certified Technology. Certification Number: 05.0.9235
- Reduces moisture buildup
Care
Basic: Hand wash with cold water using a pH neutral liquid detergent and/or fabric softner. Line dry. Do not tumble dry or iron.
What the press says
“For truly hot sleepers, leave it to NASA engineering to figure out a way to help you finally stay cool at night.”
— Real Simple
The only NASA-derived bedding
Outlast® technology, originally developed for NASA
Award-winning sleep
Recognized by sleep and home editors
Independently lab tested
Improves sleep by 20%, reduces sweat by 50%
Verified Yotpo reviews
Real ratings from 30K+ sleepers
Good to know
Frequently asked questions
How does this bedding help with temperature?
Outlast® phase-change material absorbs excess body heat as you warm and releases it back as your temperature drops.
Can I wash it at home?
Yes. Follow the care instructions above for this product and avoid high heat to protect the fabric and temperature-regulating finish.
What if it is not right for me?
Eligible products include free US returns and a 30 night risk-free trial, so you can wash it, sleep on it and put it to the test.
Real sleepers, real results
Customer reviews
+30k verified reviews, powered by Yotpo.

Tested, not just claimed
Independent sleep testing on Outlast® bedding.
50%
reduction in sweat
20%
improvement in sleep
30K+
happy sleepers
