Open design, simple, can wear parts according to need to produce pressure effect. Can use with gel package. According to the injured area cooling or heat. (please be cooling gel bag to place freezer quick-frozen half an hour above, placed with joint protectors of the aerogel for the injured area, for acute treatment, can prevent the subcutaneous bleeding after collision. Hot compress: please be placed in microwave heating gel package for 30 seconds or placed in hot water for 20 minutes, placed in the joint protectors gel for the injured area, in part chronic).