Polyurethane Imported Anatomical fit for enhanced feel Directional stretch material for a better fit Versatile design fits all Nike slip-in guards 100% authentic Nike product Shin guard slippage no more! Thanks to the Nike Guard Lock Soccer Shin Guard Sleeves. Directional stretch material allows for a superior, anatomical fit that shapes perfectly to your legs and secures shin guards. The sleeves' versatile design provides an enhanced feel and is compatible with all Nike slip-in guards.