Only one size fits all adults because of the adjustable velcro. The knee joint is heavily loaded during exercise and is prone to injury. Professional sports knee pads provide intimate safety protection for the wearer and prevent accidents during sports. Built-in SBR shock-absorbing spacers. It has stronger resilience, effectively reduces the impact force generated during exercise, and better protects the knee. Especially when the weather turns cold. There are metal springs on the back. Used to distribute pressure. Three Velcro straps can wrap your knees in all directions. Elastic fabric with holes for perspiration, moisture absorption, breathability, etc. If you buy more than two pieces, please contact customer service to get a discount. Any questions can be asked by letter. The package will be delivered within 7-15 days. Welcome to JINSE hypermarket store