The flexible metal spring plates on both sides can support and maintain the stability of the knee and absorb impact during movements such as uphill and downhill movements or frequent jumping and landing. Adopting anti fuzzing fabric, with strong durability; Perforated and breathable inner loop. The front opening design can strengthen the stability of the patella, improve stability, and the thickened circular pad can provide cushioning and protection when landing on the knee. Equipped with anti slip bars to prevent movement during exercise and provide stable protection for the knee joint. It can be adjusted freely with the Lily magic buckle, placing the knee on the knee, and two long straps around the leg to adjust to fit before pasting. Easy to wear, suitable for general outdoor sports