The POC JOINT VPD AIR KNEE are lightweight, flexible padding - ideal for riders who require absolute freedom of movement and reliable protection. The VPD Air padding is highly flexible and ventilated for optimal freedom of movement, comfort, and temperature regulation. The padding is placed in the reinforced stretchy fabric that stays safely in place thanks to the inner lining made from anti-slip neoprene and an elastic strap with a velcro fastening.