Tips - XS-XL is suitable for small dogs, 2XL-4XL is suitable for medium and large dogs. The bust of 2XL is 52cm. Please refer to the size chart before purchasing, measure your dog's bust and add 2-4cm to select the size. If you don't know, you can tell us your pets Chest, Back and Neck Size, we will help you, and we are always responsible for our customers. Easy To Wear - This dog jacket adopted high quality resin large zipper on the back, it's not easy to scratch and wear, and the large zipper is also easy to put on and take off. Convenient & Versatile -The design of the harness on the back is Reflective and adjustable, it can be connected to various dog leashes, No need to buy extra chest straps, you can use them together as a combination suit. Waterproof - The dog coat is made of waterproof fabric, good wear resistance, suitable for rainy days. The inner side is made of composite fleece fabric, warm and comfortable, and due to the superb craftsmanship and moderate thickness, your pets will not feel heavy. Windproof - The shrinkable high collarband can effectively prevent wind. The elastic band of the abdomen is designed to be more fit for the body to keep warm. The reflective strip design on the back effectively ensures the safety of the dog walking at night.