Multifunctional Honeycomb elbow pads: Featuring breathable, light and smooth fabrics, high elastic fitting, exquisite design technology, rapid perspiration and fast drying. A useful protector FOR kids / Youth. The knee pads with wrist guards are designed for kids safety when doing sports. Used for Basketball, Baseball, Football, Volleyball, Wrestling, Cycling, Skating, Skateboard, biking, skating, rolling, and more activities and games. The pads would put some pressure to the body for the safety reason, which could allow the body to hold the right position while playing volleyball, basketball, football, and other outdoor sports such as bicycle and skateboard riding and inline skating. PLEASE TAKE A LOOK AT OUR SIZING CHART AND MEASURE YOUR CIRCUMFERENCE BASED ON OUR INSTRUCTIONS: YS is fit for kids aged 5 -6, YM for 7 - 8 years old children, YL for 9 - 10 years old, and YXL for children aged 10-12