... Hand Warmer 1 CE, FDA, MSDS tested; 2 OEM welcomed!... Instant hot pack To Activate: - Locate metal disc and bend with fingers ... Contents: sodium acetate, water ( non-toxic) Detailed Product Description1) Instant heat up to approximate 54 Celsius when activated 2) Can ... , cramps arthritis pain andtenontodynia 5) To recharge: place the hot pack in boiling water with cloth below, note, preventthe plastic ...