Keep your knees protected when you're riding rowdy trails with the Alpinestars Vector Pro Knee Protector. These lightweight and flexible knee guards are constructed from a durable rip-stop material that holds up to the abuses of the trail, and feature a stretchy mesh panel for comfort and breathability. The softshell polyurethane padding delivers certified impact protection, and offers additional coverage for the sides of your knee as well. The liner sits softly against the skin with a gentle compression fit, and the guards stay in place while riding thanks to silicone printing on the inner liner as well as two hook-and-loop straps.