The Launch Pro D3O Knee Guards build on the legendary performance of Fox's existing guards and elevate the performance to new heights. Designed with input from Fox's elite level race team, these knee guards utilize D30 - the worldwide leader in impact reducing materials - and combines that technology with a removable hard cap for bulletproof durability and all mountain performance. The D3O CE certified build allows the knee guard to stay flexible for ease of movement and comfort, but upon impact, they instantly harden to dissipate the force of the crash. The Launch Pro D3O Knee Guards have a breathable, moisture wicking construction for all day comfort. Enhanced breathability through perforated, non-toxic, hypoallergenic Ariaprene neoprene Anatomically designed panels provide superior pedal efficiency and on-bike comfort - Moisture wicking back fabric keeps you cool and dry Removable/replaceable hardshell front knee cap to reduce snagging D3O CE certified insert for impact protection