1.Let's measure and buy the correct sizeNeck: Measure around the dog's neck, leaving room for two fingers. Bust: The most important size; measure your dog's chest at the widest point. Add 2 inches for comfort. If your pet is between the two sizes, we recommend ordering the larger of the two. 2.Completely Windproof and WaterproofHigh-quality material is completely windproof and waterproof. Collars and Leash LoopsDouble D-rings on the back with strong stitching, suitable for outdoor outfits for medium and large dogs. 3.High Reflective StripsConspicuous reflective strips on dog clothes provide extra visibility for night walks, outdoors or travel. Let your puppy sleep at night. Drawstring DesignThe neck and chest are equipped with an adjustable elastic cord for a better fit and comfortable wearing. 4.Zipper Hidden Windproof PlacketUpgrade and widen pvc hidden zipper hidden placket for maximum windproof. Anti-drop buckleDo not worry about the coat slipping off when the puppy is running. Suitable for winter outdoor sports.