ASICS Men's GEL-1150 Running Shoe 100% Synthetic and mesh Rubber sole Rearfoot GEL Cushioning System attenuates shock during impact phase and allows for a smooth transition to midstance Trusstic System links the rearfoot and forefoot and shores the midfoot SpEVA Midsole Material improves bounce back characteristics and decreases midsole breakdown DuoMax Support System ensures that the shoe maintains proper support for the foot during the critical transition from heel strike to toe-off DuraSponge Outsole enhances cushioning and durability in the forefoot