ASICS Men's GEL-4-to-8 Walking Shoe 100% Synthetic leather and synthetic fiber Rubber sole GEL Cushioning System attenuates shock during impact phase and toe-off phases Rocker Action midsole promotes smooth heel-to-toe gait, Solyte midsole material is lighter than ASICS' standard EVA and SpEVA, combined with improved cushioning and durability Extra-depth toe box for increased forefoot volume Open mesh upper provides excellent comfort and breathability PHF (Personal Heel Fit) features a Memory foam lined heel collar that molds to the athlete's heel, creating a personalized fit