Leatt Knee Guard Rea Flex Hybrid The Ultimate Slim Design Knee Guard If you're riding aggressively on the trails, you might want to wear extra protection so you can ride with confidence. The Leatt Knee Guard Rea Flex Hybrid is the ultimate slim-design knee guard with CE impact certification. It has Rea Flex impact gel technology that is soft and flexible but extremely tough and capable of taking hard hits. It also has a sliding hard shell knee cup for added protection, a knitted base layer for superior comfort all day long, a pre-curved 3D design for optimal fit and function, and side and upper knee impact protection. Features Premium comfort using Moisture Cool and Air Mesh wicking fabrics Silicone-printed, cupped knee grip with silicone-printed, non-slip cuffs Knitted base layer for superior comfort all day long Rea Flex impact gel technology that is soft and flexible but extremely tough Total Leatt protection score of 12 points Weight: from 300g (0. 66 lbs) per pair Sizing Size Kids Junior Small/Medium Large/Extra Large XX-Large Thigh Circumference (cm)26 - 32cm28 - 34cm33 - 41cm41 - 53cm53 - 58cm Thigh Circumference (in)10. 2 - 12. 5"11 - 13. 4"13 - 16"16 - 21"21 - 23"Calf Circumference (cm)18 - 22cm20 - 26cm25 - 33cm33 - 44cm44 - 51cm Calf Circumference (in)7 - 8. 6"7. 8 - 10"9 - 13"13 - 17"17 - 20" | Leatt | Knee Guard Reaflex Hybrid Men's | Size Extra Large In Black