The innovative Nike Unisex Flyknit Racer Running Shoe gets its structure and support from Nike Flyknit technology. As a result, it's incredibly lightweight, with a precision fit that feels like a second skin. It's no wonder the world's best marathon runners are wearing it in competition.The shoe features a single-layer upper to eliminate overlays and reduce weight as well as a waffleskin rubber outsole with racing-specific diamond pattern for lightweight durability and traction.Nike Chaussures