Try the lightest, most concealable, and comfortable cooling vest today!
UnderCool works by absorbing heat away from your body in a lightweight, long lasting, and comfortable cooling vest.
how does it do that?
Unique Garment Design
UnderCool vest uses 4 way stretch for a snug fit and strategically placed cooling packs for comfort and concealability.
Advanced Cooling Technology
ThermApparel Cooling Packs take into account human physiology, freezing at the perfect temperature to cool your core body temperature and work with your bodies natural cooling system.
more ways to use
Keep your UnderCool in a cooler, fridge, or freezer to grab and go whenever you need it.
Slip the cooling packs into the vest and wear under (or over) your favorite outer layer of clothing.
Stay safe, stay focused, and feel better after work.
Trust in Us! 60 days to try.
If a cooling vest remains in your closet because you are too embarrassed to wear it, well, then it's of zero help. Invest in your health and happiness with a durable, comfortable cooling vest. To prove it ThermApparel has a 60 day exchange/return policy for a full refund less shipping provided the vest is returned in like-new condition.
“I was able to enjoy Walt Disney World.”
Recipient of Presidential Service Award and 2
time Congressional Medal of Service Award
COOLING VEST OF CHOICE:
ThermApparel Festival Bundle
Medium White, ExtendedCool Packs
Slim Fitting, Easy Fasten
7 sizes and 2 colors. Adjusts to fit a wide variety of body shapes and sizes. No zippers or snaps.
1- 3 Hours Cooling Time
SlimCool Packs 1-2 hours cooling time.
ExtendedCool Packs 2-3 hours cooling time.
Mild detergent, cold water, air dry
Safe Effective Cooling Temperature
Cooling Packs freeze at 70F/21C. Not too cold or too hot. Keeping you comfortable and working with your bodies natural cooling.
Lightweight, Comfortable, Reusable
SlimCool Packs Weight - 1.3 lbs.
ExtendedCool Packs Weight - 1.9 lbs.
Non-Toxic and Biodegradable cooling packs are safe directly against the skin. Our packs come with our unique recycling program.
Did you know?
UnderCool cooling packs freeze at 70F working with your body to improve cooling. Other products which use Ice or colder PCMS for cooling can cause blood vessels to constrict. This prevents the cooling from reaching other parts of our body, and can cause your core to actually heat up by preventing the flow of blood to your extremeties.
frequently asked questions
Currently UnderCool comes in 7 sizes XXS - XXL to fit a wide variety of body shapes and sizes, because "one size fits all" really isn't true. UnderCool should fit your body like a glove to give you the best cooling support.
Sizing is dependent on your natural waist measurement, not your bust, shirt or pant size. You will most likely wear a vest smaller than what you think. Not sure where your natural waist is or how to get the correct sizing? Check our sizing guide to get the correct UnderCool for you.
Cooling packs will stay cold for 1-3 hours depending on your level of activity and the ambient temperature. ExtendedCool Cooling Packs last 2-3 hours. SlimCool Cooling Packs last 1-2 hours. To learn more about the cooling packs check out our tech page.
Yes. We have a 60 day return/exchange policy .
Our Cooling packs are the easiest and fastest to recharge for their next use. The packs can refreeze in ice water in 20 min, in the freezer in 40 min, and in the fridge in 60 min. Nothing else from you is required. To learn more about the cooling packs check out our tech page.
We offer two different types of cooling packs depending on your needs. The SlimCool packs last 1-2 hours and are lighter and more concealable. The ExtendedCool packs last 2-3 hours but are slightly heavier and thicker. To learn more about the cooling packs check out our tech page.
“I enjoy working at my pub more with my cooling vest”
Proud owner of Coach and Horse Pub
COOLING VEST OF CHOICE:
ThermApparel Adventure Bundle
Small White, ExtendedCool Packs
four things to decide before you buy
Bundle your order and save.
Upgrade from an UnderCool to a Festival or Adventure to save on extra sets of Cooling Packs or an extra Vest Garment.
White or black, pick your color
If you wear more dark clothing order black. If you wear more light clothing order white. If you still can't decide, buy an Adventure and get both colors!
Correct fit = best cooling
A snug fit ensures optimal cooling. With 7 sizes XXS - XXL, you will be sure to find you perfect size.
Cooling time vs. weight
ThermApparel offers 2 cooling pack options. ExtendedCool lasts 2-3 hours and weighs 1.9 lbs. SlimCool lasts 1-2 hours and weighs 1.3 lbs.