Carhartt Firm Duck Insulated Dog Chore Coat. This durable dog coat is designed for the hardest working dogs and features iconic roots. It is made with firm-hand duck canvas to protect your pup in cold, windy weather. The quilted liner is made of durable nylon with polyester batting for added warmth. Improved tabs at the neck and chest make it simple to put on and take off. Hook and loop lined straps for chest and waist allow for full adjustability. Sizing information: Small (Chest Girth: 16"- 21") Medium (Chest Girth 22"- 28") Large (Chest Girth 25"- 38") Extra Large (Chest Girth 30"- 45"). Please refer to the sizing chart in the images.