Epic React Flyknit "Hydrogen Blue/Sapphire/Lime Bl" sneakers Made for road running, the Nike Epic React Flyknit 2 is designed with streamlined elements and a clean look. This "Hydrogen Blue" version updates the one-piece textile bootie with supportive Swooshes and a modified heel counter for security and stabilization, while the responsive foam midsole cushioning and the rubber outsole has a unique fluid geometry design to help improve flexibility. Imported Composition Sole: Rubber 100% Outer: Fabric 100% Lining: Fabric 100%