ASICS Men's GEL-Tech Walker Neo Walking Shoe 100% Synthetic and mesh Rubber sole Impact Guidance System (I.G.S.) (Multi-Sport) Linked, category-specific componentry that enhances the foots natural gait. Biomorphic Fit Upper Stretch material strategically placed on the upper helps to reduce buckling and the potential for irritation. P.H.F. (Personal Heel Fit)