Use while skiing, snowboarding, bicycling, horseback riding, fishing, hunting and many other outdoor activities.
• Use hand warmers in an enclosed area with air such as a pocket or glove.
• Instant heat that last up to 10 hours.
• Just open package and expose to air.
• No kneading or shaking necessary.
• Average temperature 57°C – 70°C
• Clean, safe odorless, dry & non-toxic heat source.