ASICS Women's Gel-DS Trainer 22 Running Shoe 100% Textile and Synthetic Imported Rubber sole Shaft measures approximately Low-Top" from arch 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. Guidance LineMidsole Technology: Vertical flex groove decouples the tooling along the line of progression for enhanced gait efficiency. Heel Clutching SystemTechnology: Exoskeletal heel counter provides improved support and creates improved heel fitting environment.