Nike Kids Jr Mercurial Vapor IX FG Soccer Cleat Synthetic Leather UPPER: Lightweight Teijin upper with speed control technology for optimal control in all conditions at all speeds. Contoured last delivers glove-like fit. MIDSOLE: Lightweight perforated sock liner with textile top cloth mirrors the natural foot shape and creates low-profile cushioning. OUTSOLE: Two layers of glass fiber composite and direct inject TPU studs deliver unrivaled acceleration. Twin heel studs for optimal penetration and stability.