ASICS Men's Gel-DS Trainer 22 Running Shoe 100% Textile and Synthetic Imported Rubber sole I.G.S (Impact Guidance System) Technology: ASICS design philosophy that employs linked componentry to enhance the foot's natural gait from heel strike to toe-off. Dynamic DuoMax Support System: This evolution of DuoMax system enhances stability and support, with reduced weight and increased platform support. Propulsion TrussticTechnology: Mimics connective tissue in the foot by creating tension as foot enters propulsion stage. Propulsion TrussticTechnology: Mimics connective tissue in the foot by creating tension as foot enters propulsion stage. Heel Clutching SystemTechnology: Exoskeletal heel counter provides improved support and creates improved heel fitting environment.