ASICS Men's GEL-Foundation 9 Running Shoe 100% Synthetic and mesh Rubber sole Rearfoot and Forefoot GEL Cushioning Systems attenuate shock during impact 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 SpEVA Midsole Material improves bounce back characteristics and decreases midsole breakdown DuoMax Support System is a dual density midsole system positioned to enhance support and stability, positioned sport specifically P.H.F. (Personal Heel Fit) has two layers of memory foam line the collar and mold to the athlete?s heel, creating a personalized fit