ASICS Men's Gt-2000 5 Running Shoe 100% 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. Rearfoot and Forefoot GEL Cushioning Systems: Attenuates shock during impact and toe-off phases, and allows movement in multiple planes as the foot transitions through the gait cycle. FluidRide Midsole: FluidRide provides the ultimate combination of bounce back and cushioning properties with reduced weight and exceptional durability. Guidance Trusstic SystemTechnology: This Trusstic System integrates Guidance Line construction for enhanced gait efficiency while providing midfoot structural integrity.