This set is made to the recommendations by Horse Trainer Alex Mufson of 3 Rivers Horse Training based out of Three Forks, MT, and Phoenix, AZ. http://www.threerivershorsetraining.com. The 9' or 10' rein in your color choice is made with all 9/16' polyester double braid (yacht) rope. Finished ends with leather poppers. Attached to Bridle with slobber straps. Additional lengths available. To view Color options Click here Rope Colors.