Mossy Oak Disposable Hand and Body Warmer 40 Pairs of Mossy Oaks Camo Hand Warmers Pouch Contains Mixture Iron Powder, Charcoal, Salt, Sawdust, and Vermiculite Exposed to the Air to Generate Heat (the oxidation process takes place to generate heat) Last Around 10 hours Can be Used Inside Gloves, Pockets, Beanie Caps, and Many Other Items