Directions ‎[IN] The product implies the following usage instructions: 1. Measure your dog's chest size to ensure a correct fit. If your dog is between sizes, order the larger size. 2. Attach a leash to the front D ring for effective no-pull training. 3. Use the single buckle for easy wearing and removal. 4. The soft fleece pads provide comfort and the reflective lines ensure safety during night walks.