MATERIALS. Size M-10 Upper Suede: leather cut from the back, while the fibers remain on the surface, suede is less prone to damage than nubuck. Midsole Polyurethane foam: is one of the best thermal insulators, is lightweight, tough, and windproof. Sole Rubber: a material that is very easy to maintain and you will appreciate it especially in rainy weather. DETAILS: slight gash rear right heal shoe worn a few times as a casual shoe, stored in a closet on a shelf with cedar shoe tree inserts