It is definitely a good choice for anyone who knows you need this feature without asking them their size!^ When squatting up, it helps to increase the strength of the knee. After wearing the booster, when the knee is bent and bent, the elastic force will start at a certain angle (about 45 degrees). ^ High-strength composite leg plates. The upper and lower composite leg plates are connected in series between the carbon steel spring .^ The spring has strong elasticity, which can relieve knee pressure after squatting. Decompression helps maintain energy and is suitable for athletes, climbers, cycling enthusiasts, and aerobics.^ Therefore, we have proposed a breathable material with an internal sweat-absorbing function that can provide physical comfort and support during use.