Disposable foot warmers (1 pack - pair) Dont Bundle Up...Bundle Off with our disposable insole warmer. The unique chemistry compound makes Thaws disposable warmer last longer than others. When opened, air reacts to the ingredients inside the pouch to create a safe and long lasting heat so you can get on with your outdoor activities. Use it all day then dispose of it easily. With the THAW Disposable Foot Warmers, you dont have to let cold stand in your way. 7+ hours of safe natural heat Warms to 98F / 37C Adhesive backing keeps in place Air-activated Ready-to-use Features Long lasting TSA approved 3 year shelf life Odorless Operation Simply open package, peel back adhesive, and stick to bottom of sock