NIKE Jr MercurialX Vapor XI IC Grey Green Junior Indoor Court Soccer Soccer Shoes Synthetic comfort sole UPPER: Lightweight Tejin microfiber upper with speed ribs that offers a seamless fit and a sock-like feel. INSOLE: Lightweight perforated sockliner with textile liner for low profile cushioning. OUTSOLE: Rubber outsole for traction on indoor and court surfaces. Anti-skid top cloth grips the foot to improve traction inside the cleat. Indoor/Court (IC) outsole for traction on the street, court and indoor surfaces.