Synthetic and mesh. Rubber sole. AHAR heel plug enhances durability at initial impact. GEL Cushioning System attenuates shock during impact phase and toe-off phases. Compression molded EVA midsole provides shock attenuation throughout the gait cycle. ASICS Forefoot and Rearfoot GEL Cushioning System has a silicone based gel strategically placed at high impact areas in the forefoot and rearfoot for shock absorption. Trusstic System links the rearfoot and forefoot and shores the midfoot.