Disposable Large hand warmers (1 pack - single) 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. 20+ hours of safe, natural heat Warms up to 124F / 51C Air-activated Ready-to-use Features Odorless Long lasting TSA approved 3 year shelf life Operation Simply open package and shake slightly to activate