ASICS Men's Gel-Noosa Tri 11 Running Shoe 100% Synthetic Imported Rubber sole Impact Guidance System (I.G.S) (Running) : ASICS design philosophy that employs linked componentry to enhance the foot's natural gait from heel strike to toe-off. 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. Dynamic DuoMax Support System: This evolution of DuoMax system enhances stability and support, with reduced weight and increased platform comfort. Solyte Midsole Material: A lighter weight midsole compound than ASICS' standard EVA and SpEVA. Also features enhanced cushioning and durability. Propulsion Trusstic: Mimics connective tissue in the foot by creating tension as foot enters propulsion stage.