UnderCool 3 all day cooling or panels by refreezing one

or panels by refreezing one set while you wear the other

Learn more in our cooling pack guide

Free shipping within the USA

it is slightly more visible than an under-clothing vest

bringing your core temperature down from the inside out

UnderCool 3 all day cooling or panels by refreezing oneWhether 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.