UnderCool 3 Size:XXS Think of them like a

Think of them like a mini heat exchanger: placed on pulse points or layered into your gear

4-way stretch for a flexible

all‑day cooling that can be wrapped where you need it most

This set includes one black RallyWrap cooling wrap and two sets of ExtendedCool reusable cooling packs

you may only need a Medium UnderCool

UnderCool 3 Size:XXS Think of them like aWhether 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.