LET'S MEASURE & BUY THE CORRECT SIZE: Neck: Measure around your dog's neck leaving room for two fingers. Chest: Most important measurement; measure your dog's chest around the widest part. Add 2 cm for comfort. If your pet falls somewhere between two sizes, we advise ordering the larger of the two. PREMIUM MATERIALS: Our dog snow coat outer layer is made of waterproof and windproof polyester fiber, the inner layer is made of comfortable & warm cotton fleece mixed. With the dog outdoor jacket, protect your dog during the cold weather & bad environment. CREATIVE & FASHION DESIGN: The dog winter jacket back with zipper closure, easy to take on/off. Each dog snow jacket is equipped with reflective straps, keep your pet bright in the dark environment. And also has a hole for attaching your dog leash. CONVENIENT DESIGN: Our dog vest adopted the close-fitting design. Quick-release zipper closure makes pet coat easy to take on or off. Premium materials keep your pet warm comfortable and the bright color pattern makes your pet become the shining one in the crowd.