UnderCool 3 all day cooling bringing your core temperature down

bringing your core temperature down from the inside out

or active cosplay

it is slightly more visible than an under-clothing vest

Learn more in our cooling pack guide

UnderCool 3 all day cooling bringing your core temperature downWhether you're managing heat sensitivity, MS, lupus, fibromyalgia, POTS, or menopause, or you're an actor, cosplayer, or performer who needs to stay cool under a costume, the UnderCool 3 was built for you. Lightweight, concealable, and worn discreetly under your clothes, it delivers 1 to 3 hours of dry, consistent cooling with no ice, no condensation, and no bulk. Trusted by thousands across the US for work, play, travel, and everything in between.