The Troy Lee Designs Stage Knee Guard offers mid-range protection for heading out to the bike park in confidence. D30® is used for impact protection. It D30® is a soft and flexible guard that is comfortable while riding, but hardens on impact to disperse enegery and keep you protected.Key Features: Packable trail protection,Fitlock compression calve,Slide resistant exterior kneecap,Breathable and wicking chassis,Articulated for optimal pedalling,Mesh rear panel for ventilation,Honeycomb silicone leg gripper,CE EN1621-1 certified D30 impact pad.