ASICS Men's GEL-Kayano 16 Running Shoe 100% Synthetic and mesh Rubber sole Impact Guidance System enhances the foot's natural gait from heel strike to toe-off Guidance line provides gait efficiency, while the Discrete Heel Unit take the I.G.S. to a new level by creating the highest degree of shock attenuation and stability Space Trusstic System creates a pocket between the Trusstic System, device and the midsole, allowing for controlled midsole deformation and more efficient foot function Asymmetrical lacing design is an anatomically correct environment that reduces potential for irritation and provides improved comfort and fit DuoMax support system enhances support and stability, and is positioned sport specifically