Original UnderWarmer® Shirt


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 of over 100f/38c.

SIZING (inches):

NEW Youth sizes 65-95lbs
S/M Chest: 32 – 39
Large Chest: 40 – 44
X-Large: 45 – 49

Buy 3 or more, get them for $10 each!
Youth sizes = $5 each


Additional information

Weight N/A

Youth, Small/Med, Large, XL


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