Details: Big Hand Warmer ( Multi Warmers) (non-adhesive) Hand Warmers, Big Hand Warmers,Hand Warmer Gloves,Air Activated, Warmer Hands, Hot Hands. Size: 130x100mm Heating Last: 20~24hours Average Temp: 52C Max Temp: 62C Country of origin: China Material: Iron Powder, Water, Vermiculite, Activated Carbon and Salt.etc Application: Suitable for skiers, hunters, fishermen, golfers, or people who work or play in the cold for long hours. Directions: 1. Open the outer package and expose the pack to air, 2. Little shake, it will be heating within several minutes, put in your pocket, then you can touch it when your hand need warm, and heating for 8hours 3. Dispose of used pouch with regular garbage, it’s natural ingredients are environmentally safe. Shelf Life: 3years Storage:Keep in dry, cool place and avoid direct sunlight All natural ingredients Air Activated No batteries, no microwaves, no fuels