The optech usa curve sos strap black is designed to carry a heavy weight bag briefcase computer bag or luggage it is a neoprene strap with an internal control stretch system with bound edges the strap attaches to the bag with metal swivel snap hooks or 15 38cm webbing there is a non skid surface that keeps the strap securely on the shoulder the strap is adjustable from 20 52 and has a recommended load of 30 lbs this item is made in the usa neoprene strap designed to c