certified knee brace against latest EN 1621_1: 2012 K type A (level 1) SX knee guard frames are constructed from a high performance polymeric material blend for optimized flexibility & excellent weight saving properties. Extended thigh protection. Impact resistant PU foam knee cup certified Type A, embedded in a soft comfortable padding & breathable air mesh. High abrasion resistant fabric with an over injected TPU frame structure on outer central kneecup area to improve the impact performances. Asymmetrical & slim design for comfort & fit. Excellent haptic feedback for rider due to thin construction. Plastic frames are highly perforated for maximum breathability & air ventilation (cooling effect). Dual pivot system with integrated hinge gear system.