NIKE Mercurial Lite Shin Guards (White/Black) Low-profile shell for comfortable protection against impacts Nike Guard Lock sleeves for a secure, strapless fit Anatomical left/right-specific fit for contoured comfort Meets NOCSAE standard for NFHS/NCAA Materials: Guard: 69% K-resin/31% EVA. Sleeve: 65% polyester/19% rubber/16% spandex.