Carlos Santos 1037 rubber-soled boots in Brown Calf - Carlos Santos Sale. This is a special boot, combining soft, grain leather with refined suede to create something beautiful and out of the ordinary. This is a dress boot that is timelessly elegant. Upper: Calf Leather. Sole: Rubber-soled. Features: Formal, Derby/Gibson, Boots, Lace ups, Country styles, Rubber-soled, handmade, Goodyear welted, lasted, Portugal, Mens, lace-up-boots, derby-boot, Lace Boot. Carlos Santos 1037 rubber-soled boots by Carlos Santos Shoes