Nike Junior Mercurial Vapor IX FG Synthetic-And-Leather Lightweight Teijin synthetic leather with Speed Control technology, which ensures you don't sacrifice control for speed. Contoured speed last creates a second-skin fit Perforated sockliner mirrors foot shape for contoured cushioning Full-length, lightweight TPU with carbon fiber inserts for explosive acceleration and multi-directional grip and stud design ensures stability and balance at top speeds