661 evo knee ii661 has an army of athletes worldwide wearing testing and aiding them in their quest to design ultimate protective equipment be it dirt or street 661 protection has you covered features total impact protection and comfort with internal moulded d30 kneebreathable and flexible through cordura constructionabrasion resistance through kevlar panelssecured in place with velcro closurescomponent of the highly adaptable evo serieslight weight impact foam perforated for ventilationbloo