Trusted by thousands across the US for daily life
you may only need a Medium UnderCool
all‑day cooling that can be wrapped where you need it most
4-way stretch for a flexible
UnderCool 3 Size:XXS Trusted by thousands across theWhether 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.