It's so simple - easy to fit, and easy to use. There is very little acclimation time or special technique required. All the benefits of our Easy Walk Harness, now with the added safety of extra nighttime visibility. Highly reflective strips are woven into the nylon, making dogs visible up to 1,000 ft. The unique front-chest leash attachment stops pulling by tightening slightly across the dog's chest and shoulder blades. The gentle pressure steers your dog to the side and redirecting his attention back towards you. We do not recommend using a bungee or retractable leash with the Easy Walk Harness.