Extra SlimCool Cooling Packs cooling packs so your skin

so your skin

so your clothing

making the pack stiff and uncomfortable against your skin

this tee is an easy everyday staple

To recharge

Extra SlimCool Cooling Packs cooling packs so your skinRefresh your UnderCool 3 with a new set of ThermApparel SlimCool cooling packs designed for comfort, discretion, and all day wear. These lightweight PCM SlimCool cooling packs freeze and melt at 70F (21C). Think of it like a heat exchanger: the packs pull heat out of the blood flowing through vessels near your skin, and your body circulates that cooled blood back through your entire system, bringing your core temperature down from the inside out. They