Features: Silicone, providing excellent knee support and comfort. Suitable for long-term exercise or rehabilitation training. The unique patellar strap design accurately wraps and stabilizes the position of the patella, effectively reducing pressure and wear on the knee joint during exercise. The heat dissipation grooved design structure is not stuffy and keeps the knees dry and comfortable. Light in weight design ensures unrestricted freely movement and enhances athletic performances. Multi purpose, not limited to sports occasions, can also be used for knee protections in daily life. Specifications: Component: silicone Type: single or double Color: gray, black Size: single 33x3.5cm/12.99x1.38in, double patella 32x15cm/12.6x5.91in(refer to pictures) Package Includes: 1Pc Sports Knee Pad Patellar Strap note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.