An article of waterproof footwear is provided which contains a sole (1) joined to an insole (2) and to a welt (3) which encloses the lower edge of an upper (4), the inner surface of which is lined by a preferably semi-permeable membrane (6). The lower edge of the membrane is glued to a waterproof tape (7) joined to the insole (2). The welt (3) is preferably made in a single piece of plastic or rubber material with the sole (1). A process of manufacturing the waterproof footwear is also provided.