How Does A Cooling Vest Work?

UnderCool Cooling Pack sold in 4 cooling packs to 1 set. Sold with UnderCool Cooling Vest or as individual sets.

UnderCool Cooling Pack
sold in 4 cooling packs to 1 set. Sold with UnderCool Cooling Vest or as individual sets.

A cooling vest works by lowering or stabilizing body temperature. This helps make exposure to uncomfortable temperatures more bearable. Cooling vests are used by people suffering from heat sensitivity due to sports, industrial applications and individuals suffering from multiple sclerosis and other neurological disorders.

There are 5 different types of cooling vests. Evaporative cooling vests, ice chilled cooling vests, cool flow cooling vests and PCM (phase change material) cooling vests.

ThermApparel’s UnderCool Cooling Vest works by using PCM (Phase Change Material) cooling packs. PCMs are substances that absorb and release thermal energy during the process of melting and freezing. What does that mean? Simply, they act as a heat sink to absorb your body heat slowly over time to keep you cool and comfortable, even in humid environments.

ThermApparel uses a non-toxic bio-based PCM that out-preforms paraffin, salt hydrates, gel and ice in a number of areas. Long term stability, safe handling, sourced from recyclable materials, won’t get you wet or burn your skin. Our lightweight and flexible PCM cooling packs are reusable and can be recharged again and again and again.


UnderCool Cooling Vest is made of comfortable spandex (think comfy yoga pants) and mesh panels to keep you cool and dry for maximum breathability. Cloth: 87% Nylon / 13% Spandex
Mesh: 89% Nylon / 11% Spandex

UnderCool is secured in the front with a easy hoop-and-loop closure for easy on and off and adjustable straps for the best fit.

UnderCool comes in 5 sizes XS - XL to fit a wide variety of body shapes and sizes, because “one size fits all” really isn’t true. UnderCool needs to fit your body like a glove to give you the best cooling support. We recommend going with a the size of a super tight undershirt for men or camisole women. Best part, sizing is not dependent on your bust size… Yay for women!!… sizing is dependent on your natural waist size.

Not sure where your natural waist is or how to get the correct sizing? If you bend to the side, you will crease in the middle of your body; this is your natural waist. That's where you want to take your waist measurement. Then check our handy sizing guide and order the correct UnderCool for you.

$199.99 UnderCool Bundle - 1 UnderCool Cooling Vest with 1 set (4) UnderCool PCM Cooling Packs

$199.99 UnderCool Bundle - 1 UnderCool Cooling Vest with 1 set (4) UnderCool PCM Cooling Packs


ThermApparel is a small business making big waves in the MS world by designing the first lightweight, comfortable and invisible cooling vest, UnderCool. Check us out online, on our blog, or on Facebook, Twitter, Pinterest, LinkedIn and Instagram.



Please let us know if you have any other questions or ideas in the comments below, we will follow up..
You can always reach us via:
live chat -
www.thermapparel.net
email -
contact.us@thermapparel.net
phone - 855-232-7233
ThermApparel LLC. 125 Tech Park Dr. Rochester, NY 14620