Nike Zoom Mercurial Superfly 10 Elite SG-PRO FQ8342 600 Football Boots. Nike's professional football boots from the Shadow Pack collection are designed for play on soft natural ground or on firm ground. The upper is made of 100% Flyknit. Atomknit, an extremely lightweight and durable version of Flyknit, is located on the sides of the boot, reducing weight and providing support. Gripknit, Atomknit, and Flyknit technologies combine to create the thinnest Mercurial upper. The Dynamic Fit collar is made of soft, flexible material. The sticky Nike Gripknit material has a larger surface area. Specifications: 100% Flyknit upper 100% sticky Nike Gripknit material 100% Atomknit lateral 3/4-length Air Zoom unit 100% boot bag, studs, and key included