UnderWarmer

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UnderWarmer The UnderWarmer® is a single use, compression fitted base-layer shirt with 8 Air Activated Heat Packs built in.

Just open the packaging and within 30 minutes the shirt will reach over 100 degrees, providing warmth up to 12 hours!!

Tune in on Wednesday, October 7th to watch us on Shark Tank!
09/24/2026

Tune in on Wednesday, October 7th to watch us on Shark Tank!

Hey Chiefs Kingdom! 🏈🔥 Don’t let the cold steal your game day spirit! Grab your UnderWarmer heated undershirt and stay w...
11/28/2024

Hey Chiefs Kingdom! 🏈🔥 Don’t let the cold steal your game day spirit! Grab your UnderWarmer heated undershirt and stay warm while cheering on our boys.

https://amzn.to/3CLG0x3

Fall is here and we are back in stock with all sizes! Get your UnderWarmers for the big game or the woods from any of ou...
10/29/2022

Fall is here and we are back in stock with all sizes! Get your UnderWarmers for the big game or the woods from any of our retail partners or at Amazon.com🔥🔥🔥🔥

Address

611 CALAMAR Court
O'Fallon, MO
63368

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