Warm Tips - Please measure your pet's size accurately before placing an order! If the dog's chest is between the two sizes, it is recommended to choose the larger size. The harness has an aluminum pull hook on the back. You can attach the leash to control the puppy while walking, running, shopping and exercising, you can enjoy freedom and safety. Safety - The reflective webbing ensures dogs can be seen from the car on dark nights and in low light conditions. Comfortable - The front fabric is breathable and comfortable polyester, the dog will not feel stuffy. The fabric on the back is delicate and soft, and the weaving threads are dense and won't stick to dog hair. Easy to wear - The adjustable strap better fits the dog's body. You can close the buckle after attaching the Velcro, which is safe and firm. Why choose our dog harness? Easy to control from the outside and strong. High brightness reflective strips can better protect the dog's safety in low light and dark night. The adjustable shoulder strap adapts perfectly to the dog's body. Made of high quality polyester, softly padded mesh in the harness. It's so easy to put on and take off by adjusting the velcro and quick release buckle. Size chart for dogs and cats M Chest 35-40cm, suitable for dogs 3.0-4.5kg.