G-Form Youth Pro-X3 Knee Guards Comfortable and Lightweight Protection Mountain biking can get rough. For those times when trails are too demanding, you'll want to wear protection. The G-Form Youth Pro-X3 Knee Guards are designed for those rugged adventures. They are made with Smart Flex pads that offer lightweight protection that is flexible and hardens upon impact. They feature compression sleeves with grippers that keep everything in place while you're riding and moisture-wicking fabric that has UPF 50+ protection. Features Moisture-wicking fabric keeps riders cool and dry in the heat Smartflex pads harden on impact and remain flexible while riding Compression sleeves with grippers to keep things in place while you're riding Sizing Size Small/Medium Large/Extra Large Upper Thigh (in)10 - 12"12 - 14"Calf (in)6. 5 - 8. 5"8. 5 - 10. 5" | G-Form | Youth Pro-X3 Knee Guard | Size Small/medium In Black