Material : Inner : sodium acetate+water
Outside : PVC
Use method : Crease metal plate several times in intervals to activate
Provides heat by crystallization of cotents
To re-heat ,put in boiling water for about 10 minutes until contents turn to liquid
可重複使用暖包。按壓鐵片暖包便會固化發熱,使用30後開始冷卻。將已變硬的暖包放入熱水,煮至暖包變回液態狀便可重複使用。