For the 10th year, ASICS GEL-DS Racer 10 running shoes feature a new, modern design that will appeal to the next generation of runners. This long distance racing flat has a stable ride and exceptional foot positioning that encourages faster running. Ideal for neutral to slight overpronators.Upper: Seamless Construction reduces the potential for irritation and friction caused by traditional stitches and seams. Padded heel collar enhance instep comfort. Flat laces reduce irritation and pressure points. Mesh provides flexible breathability.Midsole: Rearfoot GEL® Cushioning System attenuates shock during impact phase and allows for a smooth transition to midstance. DuoMax® Support System positioned to enhance support and stability. Trusstic System® reduces the weight of the sole unit while retaining the structural integrity of the shoe. F.A.S.T.™ Drop similar to the geometry seen in racing flats, a low heel-toe differential reduces midsole weight to improve economy and encourages faster running. Solyte® Midsole Material features enhanced cushioning and durability. Removable insole.Outsole: Guidance Line® vertical flex groove decouples the tooling along the line of progression for enhanced gait efficiency. Magic Sole™ vented midsole and outsole minimizes weight and maximizes breathability. AHAR® placed in critical areas of the outsole provide exceptional durability.