Roper's Rope is a type of LASSO, which is a loop of rope used for catching animals. It is typically used by cowboys and ranchers to capture livestock. The term 'Roper's Rope' is derived from the name of the inventor, Charles Roper, who developed the LASSO in the late 19th century. The LASSO is made of a strong, durable rope that is designed to be thrown around the animal's neck or legs. The rope is then tightened to secure the animal.