Do not be fooled by these ultra slim knee guards. They offer great impact protection and a slim fit. Our ultra thin 6mm knee pads are certified as impact protection. AirFlex series is the slimmest, lightest guards made by Leatt®. The new Airflex Pro version now has additional side and upper knee impact protection. For an even slimmer and lighter knee guard look at the AirFlex. For a hard shell look at the Enduro and for soft and hard shell look at the Hybrid. Features tested and certified as impact protection: Knee EN1621-2 6mm impact certified profile New side & upper knee impact protection New silicon printed cupped knee grip New single sizing for perfect fit New MoistureCool & AirMesh fabrics Wicking, vented & antimicrobial All protection materials perforated for ventilation Silicone printed non slip cuffs Pre-curved 3D design for better fit & function Weight: 300g – 0.7 lbs (pair)