The design of this knee protector is reasonable and special. The middle is left blank in order to make the periphery more suitable around the knee and play a better role of cold and heat compress. The soft fabric on the back will not be cold when it is cold, so as not to hurt the skin. The front is the European standard detection of environmental protection of PVC, so that you can better see the inside of the material, both beautiful and intuitive. Let consumers at a glance.Outside polyester soft fabric built-in gel beads cold hot compress repeatedly used alternately, elastic elastic rope to adapt to various dimensions. Size: 25x16cm 21x19cm Color customization: White, pink, black, blue, light purple (color customization) Ingredients: Water glycerol polyvinyl ethylene (phthalate free) Features: non-toxic, non-corrosive, soft poly vinyl, Functions: physical cooling, hot compress, cooling, etc Origin: ChinaThe design of this knee protector is reasonable and special. The middle is left blank in order to make the periphery more suitable around the knee and play a better role of cold and heat compress. The soft fabric on the back will not be cold when it is cold, so as not to hurt the skin. The front is the European standard detection of environmental protection of PVC, so that you can better see the inside of the material, both beautiful and intuitive. Let consumers at a glance.