... 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 IN ... WATER TO BOIL,REMOVE FROM HEAT AND IMMERSE THE GEL PACK FOR APPROXIMATELY 1O MINUTES.AFTER ... TEMPORARY RELIEF OF MUSCLE ACHES AND PAINS,BACK PAIN,SINUSITIS AND MENSTRUAL CRAMPS.It can ...