Introduction of Hand Warmer :

A. Surface Material
　　Material : PVC / Phthalate-free PVC
　　Acceptance : 120 Celsius degree

B. Liquid
　　Material : High-molecule liquid
　　Component : Non-toxic and non-caustic liquid
　　Certificate : all certificate and standard got already in China, Europe, and USA.

C. Others
　　1. After bending metal plate, liquid become crystallizes and heat instantly (in 1 minute)
　　2. Temperature of hand warmer with function : 50~55 Celsius degree (maintain 30~60 minutes)
　　　 You could use towel or cloth to cover hand warmer to extend using time.
　　3. Could be re-used (unlimited use), only put into boiling water (80~90 Celsius degree) about
　　　 10 minutes or until crystal turn into liquid.