Size instructions - Even though the elastic cord design make it fit dogs of different bodily shape,To better fit your dog,please do measure the size of your dog and compare to the size chart or consult with us before placing order. XXXXL - Neck girth: 29.5', Chest girth: 31.5-37.5', Length: 23.2' Keep Dogs Warm - Down fill for enhanced warmth of heat in autumn and winter Waterproof, Windproof, Snowproof - Designed for more adventures, this water-repellent dog coat wraps the body and keeps away wind and snow Smooth & Easy Wear - Features flexible breathable material, hook & loop fastener and leash attachement on the back. No risks of sharp edges Safety Dog Vest- Highly visible reflective logo, easier to spot in the dark and avoid accidents