Alpinestars Vapor Knee Guard The Alpinestars Vapor Knee Guards are innovative, ergonomically-optimized and made from light, breathable materials while,robust outer protection structures to provide a close fit, superb articulation and greater impact performance. Features CE certified protection systems utilizing robust protective structures and impact absorption padding Thermo-formed polymer material construction offers improved impact performance Highly ergonomic design improves streamlining while providing crucial protection for MX and off-road riding Asymmetrical and lightweight ergonomic panel construction offers extended protection surfaces to reduce rotation Intelligent fastening systems offer greater flexibility, customization and prevent side rotation Dual strap closure system on Knee Protectors are specially designed to offer more comfort and adjustment Top strap mounted above the knee and lower strap positioned for ergonomic fit Advanced 3D poly padding for increased comfort and a close-fitting performance Vented panels and advanced microfibers give comfort to the rider, preventing heat build-up while maintaining tactile contact with skin Creative silicone printed graphic pattern