The Alpinestars Vapor Knee Guards have impact absorption padding, and CE certified protection systems that utilize robust protective structures to create an overall durable, high quality knee guard. Their thermo-formed polymer material construction offers improved impact performance; and it’s highly ergonomic design improves streamlining while providing crucial protection for MX and off-road riding. To reduce chances of rotation, these knee guards have an asymmetrical and lightweight ergonomic panel construction that offer extended protection surfaces. For younger riders, the Alpinestars Youth Vapor Knee Guards are also available with the same high quality protection in appropriate sizes. Check out Alpinestars protection, other Alpinestars gear, and several of other off-road body armor options on our website: CompetitionAccessories.com!