Cotton duck fabric is a heavy, plain-woven cotton fabric that is tightly woven and more durable than plain canvas. It is woven with two yarns together in the warp and a single yarn in the weft. Duck fabric is used in a wide range of applications, from sneakers to painting canvases to tents to sandbags. Cotton duck strips were the origin of duct tape, recorded in the Oxford English Dictionary as having been in use since 1899. The number of the duck is based on the weight of a 36-by-22-inch piece, and this numbering system is used to describe the various weights of duck cloth, based on the weight of a 36-by-22-inch piece. By treating with wax, duck fabric can be made waterproof. Cotton duck is related to another type of work-ready duck, duct tape, which was originally manufactured by adding an adhesive backing to regular cotton duck. Cotton duck is also used for boat sails, since the thick cotton weave is incredibly resistant to tearing and rough wear. Cotton duck fabric is dull in appearance and does not possess any shimmer.