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.