The Alpinestars GP Pro Knee Sliders Black are the same sliders as fitted to their pure one piece suits.Used by Alpinestars top racersConstructed using an exclusive PU compoundAnatomically shaped for optimal contactStandard fitment on selected Alpinestars leather suitsStrong Velcro contactsThe Alpinestars GP Pro Knee Sliders Black have been constructed from an exclusive PU compound which is durable yet allows good feel in the turns.The slider has been anatomically shaped for optimal comfort and even-wear distribution, and is lightweight.The GP Pro has a standard fitment on selected Alpinestars leather suits, and strong Velcro contact to ensure that it stays in place throughout the ride/race.