The fashionable Hamilton dog pullover is made from synthetic soft stretchy wool & is ideal for cold dry days. There is a little polo neck collar to keep your dog´s neck warm. This pullover also has extra leg loops for the back legs so it does not ride up when your dog is playing. This pullover is available in different sizes. Washable up to 30°C. Size Table for the Hamilton Dog Pullover Size Back Length Abdomen circumference XS 30cm 40cm S 35cm 46cm S 40cm 50cm M 45cm 54cm M 50cm 62cm The back length is measured from the base of the neck to the base of the tail. The abdomen circumference is measured directly behind the front legs.