ASICS GEL-PULSE 4 Running Shoes Rearfoot and Forefoot GEL Cushioning - ASICS GEL is a cushioning system created to meet the requirements of both professional and recreational runners. spEVA 45 - The SpEVA insert at forefoot provides shock absorption. An improvement upon the ASICS traditional EVA system, balloon-like polymers quickly recover their shape to be ready to absorb the impact of each successive step. Trusstic - A molded component which reduces the weight of the sole unit while retaining the structural integrity of the shoe. AHAR Outsole - Highly durable carbon rubber outsole ensures minimal wear and tear and will provide great grip on roads. ComforDry Sockliner - Insole placed inside the shoe which provides cushioning keeping the foot drier and cooler.