Nike keeps your little athletes covered with the Attack Stadium shin guards. Durable two-piece guards. K-Resin shell is tough yet lightweight. Phylon foam absorbs impact. Removable ankle pad. Size chart: SM: height - 3' 11 - 4' 3 MD: height - 4' 3 - 4' 7 LG: height - 4' 7 - 4' 11 50% K-Resin 25% EVA 21% polyester 4% rubber. Imported.