ThermApparel UnderCool Cooling Vests provide comfortable cooling for 1-3 hours. SlimCool Cooling Packs average 1-2 hours, and ExtendedCool Cooling Packs average 2-3 hours. Cooling times vary depending on ambient temperatures and level of activity.

Watch Brad explain how long your ThermApparel Cooling Packs will last.

Questions about our vests or shipping? Reach out to the ThermApparel team toll-free at 855-232-7233, write to us through our website’s contact form or chat with us via live chat. We always respond because, otherwise, that wouldn't be cool.