Adjustable, comfortable, light, and there when you need it, the all-new Apex Knee Guard applies modern knee-fit design to tried-and-true knee protection. Ventilated bio-foam under plastic outer knee cups and shin plates are held in place by soft, comfortable elastic bands. For riders who don't like the feel of knee braces, this lightweight option delivers impact protection without the bulk of a brace. Chassis made of vented bio-foam. Plastic outer knee cups and shin plates with soft comfortable elastic bands. Easy on / easy off hook-and-loop closures. One size fits most.