This overspeed training device is the safest training device you will find. By attaching this devise to 2 runners you can overspeed the runner in back with comfort and security. The back runner allows the front runner to stretch the elastic up to 3 times its length. This then allows the back runner to be pulled forward with the help of the elastic.
20’ Safety sleeve elastic with 2 swivel belts.
Note: The Manufacturer of this product does not ship to Canada.