Extra ExtendedCool Cooling Packs cooling pack Provides approximately 2-4 hours of

Provides approximately 2-4 hours of cooling per freeze for long shifts

4-way stretch with velcro closure that adjusts anywhere along the wrap for best fit and comfort

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and outdoor jobs

and UltraCool vests

Extra ExtendedCool Cooling Packs cooling pack Provides approximately 2-4 hours ofRefresh 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