ASICS Men's GEL-Neo33 Running Shoe 100% Synthetic and Mesh Rubber sole Impact Guidance System (I.G.S.) ASICS design philosophy that employs linked componentry to enhance the foot's natural gait from heel strike to toe-off. DuoMax Support System A dual density midsole system positioned to enhance support and stability, positioned sport specifically. Rearfoot and Forefoot GEL Cushioning Systems