A conveyor belt consisting of a central stress-bearing carcass for transmitting power enclosed in rubber or PVC covers to protect the carcass from abrasion and atmospheric changes. The carcass usually consists of plies of cotton duck fabric, but other constructions used are cotton cords, steel cables, and woven fabrics of synthetic fibers, such as rayon, nylon, Orlon, Dacron, fiberglass, and asbestos. The covers are furnished in various thicknesses and qualities of rubber or PVC compounds.