Tips: The orange strip at the toe cap of the product may be dark blue due to batch and other issues, please refer to the actual product. Like any quality sneaker, the Puma RS-X Hard Drive is designed to help you every step of the way. Mesh, textile and rubber panels rotate on the upper, providing breathability and soft visual decoration. PUMA's Running System technology is actually the nut and bolt of the engine for comfort and luxurious cushioning, with a rubber outsole that instantly helps you stop. There is a plastic heel at the back for easy onning and doffing, while the PUMA RS-X and Running System are subtle markings on the tongue, tongue and heel.