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How to boost performance with UnderCool

  • Prepare

    • • Start with a cooler core for more peak performance
    • • Wear UnderCool before activity for 30-60 min.
  • Perform

    • • Cooling reduces heart rate and improves focus
    • • UnderCool is light and flexible when you need it most
  • Restore

    • • Reduce the bodies burden in cooling down
    • • Slip UnderCool on to cool down quickly

Important: ThermApparel cooling products can help prevent the effects of overheating from exertion or the environment. But when signs of heat exhaustion are present, seek immediate medical treatment.

Works with your body.

When your body is hot blood vessels open up to allow heat to be released.

Ice and Gel Packs cause blood vessels to constrict, preventing cooled blood from reaching your core.

ThermApparel PCM cools the blood without constriction keeping your whole body cool.

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not all cooling vests are created equal.

But we’ve got you covered.
Breathable wicking fabric, fully adjustable straps and cooling packs that conform to your body for maximum cooling. Plus, it all weighs under two pounds.
Cool, right?

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How to beat the heat

  • Cool it.

    • • Quickly charge the cooling packs in the fridge, freezer or ice water.
    • • Cooling packs provide about 2 hours of oh-so-sweet cooling.
  • Wear it.

    • • Slip the cooling packs into the vest and wear under your outer layer of clothing.
    • • Before ordering, check out our sizing guide to find your best.
  • Love it.

    • • Take UnderCool for a spin in with our  60 day return policy.
    • • Rechargeable cooling packs mean you can look forward to using it again and again.

The safest, smartest cooling tech.

Our vests are long-lasting and ready to provide cooling relief for seasons to come. Never settle for less! With UnderCool, it’s all good.







Our Tech

Questions about our vests or shipping? Reach out to the ThermApparel team toll-free at 855-232-7233, write to us through our website’s contact form or chat with us via live chat. We always respond because, otherwise, that wouldn't be cool.