1.Whenever you buy, please measure your dog's chest length, neck length and back length, then carefully choose the size according to the size chart. 2.2-in-1 design of dog jacket and dog carrier, as a jacket, it has waterproof outer layer and warm wool inner layer to keep your dog warm. As a dog carrier, it is comfortable and safe, the thick coat can protect your dog from injury, don't worry about your dog being strained by the carrier. 3.This hooded jacket can be worn as a hat for your dog to avoid ear frostbite in snowstorms. In the cold winter, the dog's resistance will decline, put the coat on your dog can prevent your dog from catching a cold. 4.Zipper design, easy to put on and take off, zipper design allows you to save a lot of time and make your pet more comfortable. 5.It can be used in rainy and snowy days, don't worry about your pet getting wet.5.The inner layer of the coat is warm wool and cotton padding, which is enough to protect your pet from the cold weather.