... cold compress:relieve headache,fever,toothache hot compress:relieve arthritis,stomach trouble,...... materia Gel PVC Slipperhelp stimulate blood circulation can relax ... massage. Certification MSDS, CE, SGS, FDA, ISO13485PVC SlippersFunction1.Massage Gel Insole helps stimulate blood circulation2.can relax and gently massage ... for half and hour before usin pvc cold and hot pack, reusable gel slipper