Rear and Forefoot Gel - ASICS trademark cushioning system which absorbs impact force superbly, dampening shock in the initial heelstrike and allowing for a smooth transition through the step, greatly increasing comfort and performance and reducing the risk of injury. * Trusstic System - Under the arch is a plastic component which gives the shoe great strength and enhances flexibility and stability. * SoLyte Midsole - Spongy layer between the sole and upper designed to absorb shock and cushion the foot. Solyte is a lighter material than SpEVA and EVA and features enhanced durability. * I.G.S. (Impact Guidance System) ASICS" design philosophy. It aims to make shoe components from rear to midfoot and forefoot to work together effectively to allow the body to perform in a natural manner. ASICS designers strive to compliment, not correct, how the legs and feet move. * Weight: 331g