Nike Men's Legend Essential 3 NN Training Shoes feature a synthetic and mesh upper. Equipped with a flat heel high-abrasion materials and a flexible sole it provides comfort and support that's ready to hit the gym. See the specks on the outsole? That means it's constructed with at least 8% Nike Grind material made from scraps from the footwear manufacturing process. High-abrasion honeycomb mesh and durable overlays on the back and sides give it grit to keep you going. Grooves under the toes keep it flexible enough for agility drills. Grippy traction keeps you moving on all types of gym surfaces.