ASICS PIRANHA SP4 Racing Shoes Weight: 120 grams DuoSole - The DuoSole construction offers lightweight flexibility and also increased traction through a special moulding of components which is perfect for racing. SoLyte - Midsole material designed to absorb shock and cushion the foot. More durable and lighter than standard EVA, a quality addition to any shoe. Slip Lasting - The sole is shaped to be more lightweight and more flexible helping you get as much out of your run as possible. 3M Reflective - Reflective components have been added to increase your visibility in low light conditions.