ASICS Men'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 Space Trusstic System creates a pocket between the Trusstic System, device and the midsole, allowing for controlled midsole deformation and more efficient foot function 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