The lightweight-nylon 6-ft. Dokkens 2-in-1 Puppy Leash is durable, versatile, and ideal for training and everyday use. Use as a regular leash by clipping to collar or use it as a slip lead for obedience training. Designed by professional trainer Tom Dokken, who works with hundreds of dogs every year and understands the value of quality training equipment. Imported. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Leashes.