... SGS,ISO and TEST REPORT The biggest manufacture for natural heat products Designed for healthcare and warmth-keeping,skiers, hunters, fishermen ... /cartonMaterial: Iron Powder, Water, Vermiculite, Activated Carbon, Salt,Absorbent polymer resin and Alkali. Direction :1.Open the outer package and ... temperature will be higher than 40 °C and last for 12hours.Safe instruction :1.Its non-woven cloth were ...