Nike Air Sky Raider 2 Running Shoes Leather Lightweight breathable open sandwich meshes uppers - keeps your feet cool in hot conditons Rubber outsole with herringbone pattern for traction - makes the shoe grippy and gives bet Dual density - Higher density EVA on the medial (inside) of the shoe which helps prevent o BRS 1000 - Carbon rubber outsole for great durability meaning your shoes will last for lon Encapsulated Air - Fore and rear foot Nike air for a responsive and cushioned ride.