The Heat Factory Mossy Oak Mini Hand Warmers give you fast-acting, long-lasting heat for hours when you're out in the cold. These warmers are designed as a soft, lightweight pouch containing an inert mixture of iron powder, charcoal, salt, water, and vermiculite. When exposed to air and given a light shake, a natural exothermic reaction generates consistent and prolonged heat for up to 10 hours. The pouch is made of soft cloth lined with a very thin layer of porous plastic for maximum durability. The warmers are odorless and non-toxic. Made in the USA. Includes 10 Hand Warmers in a Mossy Oak pattern.