Extra ExtendedCool Cooling Packs Number of Packs:4 wherever you need cooling most

wherever you need cooling most

Check your cooling packs when they are fully melted (after use

After your order is processed

Perfect for heavy gear

or adding a second color to your rotation

Extra ExtendedCool Cooling Packs Number of Packs:4 wherever you need cooling mostRefresh your ThermApparel UnderCool 3, RallyWrap, and UltraCool cooling vests with a new set of long lasting ExtendedCool cooling packs. ExtendedCool cooling packs freeze and melt at 70F (21C) to deliver strong, comfortable cooling. 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