hand warmer Supply OEM Reusable hand warmer becomes warm at once. reusable, lovely Certification MSDS, CE, SGS, FDA, ISO1348 Hand Warmerkeep you warm in ... winter and suitable for promotion.Features:1) Instant heat up to approximate 52 ... button downwards, rub it until it becomes soft, this hot pack gives soothing effect to rheumatic conditions of joints as ...