The Classic True Blue Heavy Cable Knitted Ribbed Fashion Dog Sweater is composed of a Plush Soft Cotton and Acrylic blend. Features an easy pull over design that slips on for easy On and Off access. This Pet Sweater is furthermore Machine Washable and features an Ultra Cozy Turtle neck along the top and a stylish weaved design along the back side. Keeps your Pet warm and comfortable during those colder winter climates and warm during those chilly summer night strolls. Available in Multiple Sizes and Colors. Sizing Guide - From Back of Neck to Tail area ("In" Inches) 8" - EXTRA SMALL 10-12" - SMALL 14-16" - MEDIUM 18-20" - LARGE