Impact Guidance System – employs linked componentry that enhances the foot’s natural gait from heel strike to toe-off. Space Trusstic System allowing for controlled midsole deformation and more efficient foot function. ComforDry Sockliner provides cushioning performance and anti-microbial. Biomorphic Fit Upper is a stretch material helps to reduce buckling and the potential for irritation. Asymmetrical Lacing Design reduces potential for irritation and provides improved comfort and fit.