The UnderWarmer® is a single-use, compression fitted pull-over shirt.
8 HEAT ELEMENTS are built-in and will activate within minutes of removing from its packaging.

When ready to use, simply remove  The UnderWarmer® from its packaging. Upon opening, heat activation begins and will take approximately 30 minutes to reach its maximum temperature.

The UnderWarmer is safe to wear directly against your skin.


We like to say, The UnderWarmer® will help you embrace the cold outdoors!

From soccer moms to serious deer hunters, any cold weather situation is perfect for The UnderWarmer®

It’s a no brainer.

Jeff Pfeifer, Avid Outdoorsman
Loved it .. kept me warm the whole day ..
I’ll be wearing one to every cold game this season!”
Riley Reynolds

The UnderWarmer® – $11.99

Buy 3 or More – $10.00 Each! 

The UnderWarmer® is designed to fit many body types.
We’ve provided some detail of our models height and weight to help you decide what size will fit you best.