The disposable hand warmer consists of an air impermeable outer film package and an air permeable inner pad containing iron powder, activated carbon, water, vermiculite, and salt. When the outer package is opened, air contacts with the inner pads and the iron powder generates oxidation heat with the help of other materials. The natural, non-toxic materials are safely generate constant heat for up to 8 hours without fire, smoke or odor.

• Up to 8 hours of warmth
• Odorless
• Heats in minutes
• Non-toxic
• Disposable