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 IGS 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 268g