DOCO® ALL DAY WARM FLEECE OUTER, sleeveless fleece polo T-shirt made with super soft fleece to prpect and keep the dog warm in cold weather. Specially designed D-Ring for leash attachment on th eback. It is a great option for chilly days when you don't want to fuss with getting a leash on under or over clothes. Just attach and go. For safety reasons, we advise owners againg using the D-ring if the dog pulls vigorously. Size Chart XS 3-5LB (1-2KG) S 5-8LB (2-4KG) M 8-15LB (4-7KG) L 15-20LB(7-9KG) XL 20-25LB (9-12KG) DOCO® ALL DAY WARM FLEECE OUTER, sleeveless fleece polo T-shirt made with super soft fleece to prpect and keep the dog warm in cold weather. Specially designed D-Ring for leash attachment on th eback. It is a great option for chilly days when you don't want to fuss with getting a leash on under or over clothes. Just attach and go. For safety reasons, we advise owners againg using the D-ring if the dog pulls vigorously. Size Chart XS 3-5LB (1-2KG) S 5-8LB (2-4KG) M 8-15LB (4-7KG) L 15-20LB(7-9KG) XL 20-25LB (9-12KG)