Easy Walk Harness ☆Size S ☆Color Black Silver Prevents pulling Doesn't hurt Training collar leash Walk training pet dog When shipping, the item will be removed from its transparent box and only the main unit and instruction manual will be shipped. Please understand that this is a home-stored item. This is a training harness made by the American manufacturer PetSafe, utilizing dog behavior. It naturally guides the dog to walk beside you and effectively prevents pulling without causing discomfort. By attaching the leash to the front of the chest, it becomes difficult for the dog to get ahead of the owner. When the leash is pulled, the martingale loop tightens, reducing the dog's forward momentum. Since it doesn't constrict the throat when the leash is pulled, there's no worry about difficulty breathing or vomiting. Training can be done without burdening the dog. Buckles on the shoulders and belly make it easy to put on. Once the size is adjusted, it can be put on quickly. Size: [S] Chest circumference approx. 37.5-50cm Jack Russell, Sheltie [Note] Leash is not included. It will be delivered from the post office via YuYu Mercari便. No shipping on Saturdays, Sundays, or holidays.