Air Activated And Ready in Minutes- Air- activated heat packs mean that you’re ready for the cold at a moment’s notice. It’s the best way to stay warm with zero prep – no charging needed. Simply open it. Put it on. Feel the warmth.  (up to100°F/38°C) 

ReSeal and ReUse- The UnderWarmer is disposable. However!...if only worn for a few hours, place it in an air tight/ziplock bag and it will stop producing heat. When you remove the UnderWarmer it will reactivate.This can be done 2-3 times. Then yes, the UnderWarmer is expired.   

Feel Snug And Gently Stimulated– The UnderWarmer is a soft, lightweight compression shirt. So it feels really, really good. But most importantly, that snug fit means the warmth stays right where you need it – near your skin. 

Perfect For Cold Weather Activities– You always thought that you had to choose between your favorite winter activity and staying warm. But no longer. Whether you’re hunting, tailgating, hiking or camping in the cold outdoors, the UnderWarmer heated bodywarmer will make it a wonderfully warm experience.

Great Gift For Football Fans – Gift your tailgating spouses and buddies (or yourself!) with a way to enjoy cold weather football games AND stay warm.