The Asics Gel Trounce 2 Trainers feature a GEL Cushioning System at the front and back of the shoe. The Gel Trounce 2 feature a breathable air mesh upper that keeps your feet cool and a supportive carbon rubber sole. Designed for runners who overpronate the Gel Trounce 2 provide excellent support and stability with a DuoMax support system. The Trusstic System consists of a plastic bridge under the foot arch to offer excellent strength and stability with no loss to flexibility. - A.D. Rearfoot and Forefoot Gel Cushioning - Asics Gel is a cushioning system created to meet the requirements of both professional and recreational runners. DuoMax Support System - A dual density midsole system positioned to enhance support and stability positioned sport specifically. Trusstic System - A plastic bridge located under the foot arch which provides strength and stability without loss of flexibility. Also helps to control torsion. Carbon Rubber - Located in the heel for maximum abrasion resistance. Blown Rubber - Located on the outsole promote an efficient stride while boosting cushioning. Air Mesh Upper - Provides great breathability helping to keep your feet cool. California Slip Lasting - This upper is stitched around the EVA board and directly attached to the midsole for better stability and ultimate comfort.