ASICS Men's GEL-Nimbus 12 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 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 Discrete Eyelets are independently placed to disburse lace tension, creating a customized fitting environment and enhanced upper comfort