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The original air-activated bodywarmer

Free shipping + Free returns

On orders of $25 or more

UnderWarmer
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UnderWarmer

As seen on Shark Tank

Stay warm. All day.

No batteries. No charging.

air-activated bodywarmer

12 hours of heat, air activated, always ready, disposable

The air-activated heat packs create the warmth. The compression-fitted shirt brings it all together. It's what makes UnderWarmer a wearable warming system.

Where will you wear your UnderWarmer?

  • Football Games
  • Tailgating
  • Hunting
  • Fishing
  • Sidelines
  • Golf
  • Skiing
  • Festivals
  • The UnderWarmer® Air-Activated Bodywarmer
  • The UnderWarmer® Air-Activated Bodywarmer
  • The UnderWarmer® Air-Activated Bodywarmer
  • The UnderWarmer® Air-Activated Bodywarmer
  • The UnderWarmer® Air-Activated Bodywarmer

Air Activated And Ready in Minutes

Ready at a moment’s notice with zero prep. You’ll feel the warmth in minutes (up to 100°F/38°C).

Warm Without The Bulk

A comfortable, lightweight layer that’s disguised right under your clothes. Avoid the bulk and stay fashionable.

Perfect For Cold Weather Activities

It’s the difference between being comfortable and miserable. And it’s a small price to pay to stay warm. All day.

Great Gift For Football Fans

Give your tailgating spouse and buddies (or yourself!) a way to enjoy cold-weather football games AND stay warm.

UnderWarmer

Don’t let the cold end your day early.Free shipping + Free returnsOn orders of $25 or more

Buy now$14.99

Reseal for multiple uses

Reseal for multiple uses