The ASICS GEL-DS Trainer 21 Cross Trainer Shoe is the perfect blend of comfort and performance. With the Impact Guidance System, it offers a natural heel to toe movement. While getting ready for propulsion, the Trusstic feature of this shoe prevents shock and pressure. The Dynamic DuoMax® Support System improves your strides, while offering optimum support and grip. Thanks to the Heel Clutching System, this shoe snugly hugs your foot. The DuoSole® outsole provides unparalleled traction.