ASICS Women's GT-2150 Running Shoe Synthetic and mesh Rubber sole Impact Guidance System (I.G.S.) (RUNNING) employs linked componentry that enhances the foot's natural gait from heel strike to toe-off Space Trusstic System creates a pocket between the Trusstic System device and the midsole, allowing for controlled midsole deformation and more efficient foot function Solyte Midsole Material is a lighter weight midsole compound than ASICS' standard EVA and SpEVA providing enhanced cushioning and durability DuoMax Support System enhances support and stability ComforDry Sockliner provides cushioning performance and anti-microbial properties for a cooler, drier, healthier environment