ASICS Men's GEL-Fluent 2 Running Shoe 100% 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