Reebok ZPump Fusion 2.0 Men's Running Shoes Allou/Grey/Yellow/Coal/White : Dominate the run with the lightweight flexibility and durability of Reebok ZPump Fushion 2.0 running shoes. Runners receive a more personalized, locked-in fit that provides comfort for miles. The Pump technology is an air-filled cage that can be pumped up, helping to mold the shoe to the runner's foot. The Fusion sleeve upper provides a seamless and flexible lightweight compression sleeve for the foot. Upper:Features a mesh and sythetic material with Pump technology for a custom fit. Midsole: Fitted with a Fusion sleeve for a lightweight and seamless compression sleeve that fuses the Pump technology to any runner's foot. Outsole:Includes durable ZRated rubber material for the outsole.