This is a training harness made using a dog's natural instincts. New Brand: PetSafe Size: S Color: Black & Silver *The outer box will be removed, and the item will be shipped as the main body only. Product Description This training harness is made by the American manufacturer PetSafe, utilizing a dog's natural instincts. It can naturally guide the dog to the side, making it easy to control pulling. By attaching the leash to the front of the chest, the dog is less likely to go ahead of the owner. When the leash is pulled, the martingale loop tightens, weakening the dog's forward pulling force. It doesn't choke the dog's throat even when the leash is pulled, so there's no worry about breathing difficulties or vomiting. Training can be done without putting a burden on the dog. Easy to put on with buckles on the shoulders and belly. Once you adjust the size, you can put it on quickly. Sizes: 【S】Chest circumference approx. 21.5-28cm, Waist circumference approx. 38-53cm / 【S/M】Chest circumference approx. 28-33cm, Waist circumference approx. 48-66cm / 【M】Chest circumference approx. 30-38cm, Waist circumference approx. 53-81cm / 【M/L】Chest circumference approx. 35.5-46cm, Waist circumference approx. 62-86cm / 【L】Chest circumference approx. 40.5-53cm, Waist circumference approx. 68.5-101.5cm / Chest circumference is measured from "the base of one front leg to the base of the other front leg", and waist circumference is measured around "the thickest part of the chest, under the dog's armpits". 【Note】Leash is not included.