UltraCool Men's Tank

The UltraCool Tank offers NASA temperature regulation in ultra-soft jersey knit, perfect for bedtime or casual lounging with a relaxed fit.

- Jersey knit for an ultra-soft, breathable fabric with a little bit of stretch.

- Oeko-Tex Standard 100 Certified Technology

- Base Fabric: 47.5% Cotton / 47.5% Modal / 5% Spandex

- Trim Fabric: 100% Japanese Cotton

- Outlast® Matrix Infusion Coating

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. Remove from dryer immediately. Do not dry clean. Do not iron.

Width - 16.5”
Length - 18.5”

Width - 18”
Length - 19”

Width - 20”
Length - 19.5”

Width - 22”
Length - 20”

Width - 24”
Length - 20.5”

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:

Your perfect companion for bed or lounging around the house.
NASA-Engineered Comfort

Outlast® technology infused fibers proactively regulates heat and moisture by absorbing, storing, and releasing heat.

Relaxed Fit

Perfect for bedtime or lounging around the house, the UltraCool Tank has a rounded neckline, sleeveless silhouette, and relaxed body.

Eye-Catching Design

The UltraCool Tank features contrasting colors on the side panels for an eye-catching design.

Man wearing the Slumber Cloud Essential Tank made with Outlast temperature regulation technology
Man wearing the Slumber Cloud Essential Tank made with Outlast temperature regulation technology

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 lounge generally runs slightly small. We recommend sizing up from your standard sizing.

The premium fabric has a super soft cotton hand-feel, with a slight cool touch.

Yes! The basis of the technology was originally founded and used by NASA. It even holds a Certified Space Technology Foundation seal of approval!