1) Adopt nanometer technology, with dual effects of thermoelectricity & piezoelectricity 2) Help expel wind and clear away cold, warm and activate meridian, promote blood circulation to arrest pain, etc 3) Material: Ultra soft hairy self-adhesive cloth, inlaid high penetration permanent health magnet 1) Adopt nanometer technology, with dual effects of thermoelectricity & piezoelectricity 2) Help expel wind and clear away cold, warm and activate meridian, promote blood circulation to arrest pain, etc 3) Material: Ultra soft hairy self-adhesive cloth, inlaid high penetration permanent health magnet Brand SUNSKY SKU 100804150_NP-1021284259 Model S-OG-1813