gel heat pack : 1.CE,FDA,ISO13485,MSDS,SGS 2.Microwavable for hot use and freezer for cold use 3.Reasonable price Gel heat and ... cold pack Specifications : APPLICATION : COLDSTORE ... .HOT WATER : BRING WATER TO BOIL,REMOVE FROM HEAT AND IMMERSE THE GEL PACK FOR APPROXIMATELY 1O MINUTES.AFTER 4 MINUTES,CHECK ...