Asics Gel Resolution 4 Mens Tennis Shoes Impact Guidance System (I.G.S.) - Asics design philosophy in which the individual components of the shoe work together resulting in a more comfortable step and an improved gait.

Biomorphic Fit Upper - Stretchy material strategically placed on the upper which reduces bunching when the shoe moves reducing the risk of blisters and irritation.

SoLyte Midsole Material - 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.

Rearfoot Gel Cushioning System - Silicone-based material placed in critical areas of the sole which dampens shock when the foot hits the ground allowing for a smooth movement through the step and reducing the risk of injury.

Trusstic System - Plastic bridge under the arch which gives the shoe strength and stability without loss of flexibility.