ASICS Women's GEL-Cumulus 11 Running Shoe Synthetic and mesh Rubber sole Impact Guidance System enhances the foot's natural gait from heel strike to toe-off Gender Specific Space Trusstic System, recognizes the normal periodic changes in the shape of the woman's arch and provides for the controlled deformation of the arch into the space within the system Rearfoot and Forefoot Gel Cushioning Systems attenuate shock during impact phase and toe-off phases and allows movement in multiple planes as the foot transitions through the gait cycle ComforDry Sockliner provides cushioning performance and anti-microbial properties for a cooler, drier, healthier environment Solyte Midsole Material features enhanced cushioning and durability