Impact Guidance System: Enhances the foot's natural gait External Heel Clutching System technology: Provides improved support and creates an improved heel fitting environment Propulsion Trusstic technology: Mimics connective tissue in the foot by creating tension as the foot enters propulsion stage Full Length Flytefoam midsole: Provides unrivaled lightness and maximum cushioning in every step Rearfoot and Forefoot GEL Cushioning Systems: Attenuates shock during impact and toe-off phases, and allows movement on multiple planes as the foot transitions through the gait cycle Duosole outsole: Rotuces weight and enhances flexibility while maintaining traction and durability Drop: 10 mm Predecessor Product Type: GEL-DS Trainer 21
