... ,reusable gel pack 2.hot or cold compress to painful area 3.Certification MSDS, CE, ISO13485 4.supply OEM cold hot pack ... can adapt to unlimited times of alternately cold or hot use after pre-cooling or pre-heating treatments. ... sunstroke, scald, muscle scuffing, sprain, trauma haemostasis, beauty etc.Hot compress:arthritis, rheumatism, menorrhalgia, stomach trouble, cervical vertebra trouble ...