The Leatt AirFlex Hybrid Knee Guards are a surprise in the world of rugged knee protection. Every bit is soft, flexible, and ventilated, with the exception of the sliding knee cup that adds a bit of energy deflection to the AirFlex pad. But despite these massive comfort improvements over tradition knee pad design, the Leatt AirFlex Hybrid Knee Guards retain a Knee EN1621-1 impact protection certification. They're super slim and low profile, making them perfect for enduro riders or anyone else who needs to ride hard up and down.