Air activated. Just peel off the adhesive cover and will self-heat within seconds.
Temperature control sheet.
Heat lasts up to 8 hours.
Safe and efffective.

Technical Details

Product Details

Package Dimensions
Width : 3.19 inch
Height : 0.2 inch
Length : 6.3 inch

Shipping Weight: 2.4 ounce (View shipping rates and policies)

ASIN : B012YMT3LS