STAY COOL Sleepwear - Women's Top

Wearing less isn't always the secret to staying cooler. Created in partnership with Swiss sleepwear start-up, Dagsmejan, our sleepwear combines natural eucalyptus fibers with Nattcool™ technology to cool and remove moisture from your body. As smooth as silk and much easier to care for, all while providing better temperature control.

- NATTCOOL™ fabric is cooler than linen, softer than silk, and better at moisture management than cotton

- 8x more breathable than cotton

- Oeko-Tex Standard 100 Certified Technology

- Tagless design with flat, ergonomically placed seams

- 92% Microlyocell from eucalyptus and 8% Elastane/Lycra NATTCOOL™ fabric

Basic Care:
Machine wash cold water on a gentle cycle with a mild detergent and with like colors only. Do not use fabric softener. Only use non-chlorine bleach when needed. Tumble dry low heat until completely dry.

Chest - 33” - 35”
Waist - 26” - 29”

Chest - 36” - 38”
Waist - 29” - 31”

Chest - 38” - 41”
Waist - 32” - 34”

Chest - 41” - 44”
Waist - 35” - 38”

Chest - 45” - 47”
Waist - 38” - 42”

All U.S. orders are shipped right to your door, free of charge.

Sleep on it, wash it, and really put it to the test for 60 nights! If you don’t love your new bedding, just return it for a full refund. No questions asked!

Why You'll Love It:

We've partnered with Swiss sleepwear start-up Dagsmejan to launch sleepwear developed with NATTCOOL™ technology.
Exceptional Breathability

Excess body heat is released through the fabric keeping you cool.

Ultra Cooling

Evaporative cooling ensures you don't overheat.

Fast Drying

Sweat is pulled away from the skin and is quickly released through the fabric keeping you dry.

Exceptional Breathability
Ultra Cooling
Fast Drying

Why It's Different

Most companies that claim to have cooling, sweat-wicking bedding only attempt to manage temperature once you've already become uncomfortable. Slumber Cloud is doing something different.

Slumber Cloud Bedding utilizes Outlast® technology for a proactive, not reactive, approach to temperature regulation. Outlast® technology regulates heat to stop moisture from developing in the first place, instead of attempting to wick away sweat that has already developed.

Not too hot…not too cool…just right.


Slumber Cloud products are designed to help manage heat and humidity build up. It is not an air conditioner with a set temperature degree, but it will react to your temperature all night long to reduce heat build up and manage temperature swings.

The Stay Cool Sleepwear generally fits true to size. We don't recommend sizing up or down from your standard sizing.

With 8% Lycra, the fabric does have some stretch, ideal for sleeping and lounging in!

The premium fabric has a super soft athletic hand-feel, with a little stretch to the fabric.