Don't let the heat get in the way of the things you love most.
It's time to take back your life, stay cool and be cool!



No one wants a bulky cooling vest weighing them down. That's why UnderCool cooling vest weighs less than 2lbs— including the cooling packs.



Made from breathable mesh and wicking fabrics, UnderCool cooling vest is designed to keep you cool and dry. Our flexibility is unmatched.



Our slim design conforms to your shape, allowing UnderCool cooling vest to be concealable under your clothes. You can stay cool and no one else has to know.

"ThermApparel has flipped the script on cooling vests.
UnderCool is a game changer."


“You’ve given me my Florida summers back!”

“Guys, I just want to say THANK YOU SO MUCH for your cooling vest! You’ve given me my Florida summers back! I’m MS heat intolerant, so since my diagnosis in 2016, I hibernate in the summer. No more! Yesterday I wore the vest to Epcot on a 95°F day and I was perfectly comfortable. The vest is cool, cute (hey, I’m still a girl), lightweight and even gave me the added bonus of lumbar support during our 5 mile excursion of the park. I’m so grateful!” ~ Nicole, Florida