ASICS Men's GEL-Nimbus 11 Running Shoe Synthetic and mesh Rubber sole Impact Guidance System (I.G.S.) enhances the foot's natural gait from heel strike to toe-off Solyte midsole material is lighter than ASICS' standard EVA and SpEVA, combined with improved cushioning and durability Space Trusstic System creates a pocket between the Trusstic System device and the midsole, allowing for greater midsole deformation and more efficient foot function Biomorphic fit upper provides a superior fit and function Asymmetrical lacing design enhances upper fit and comfort while minimizing the potential for irritation