The Pet Life ® 'Aura-Vent' Stretch and Quick-Drying Lightweight Full Body Dog Jacket is geared with a Dual-Fibered Exo-Shell for true Year-Round outdoor Protection. The Outer-shell is composed of a lightly-lined fabric that's Windproof, Water-Resistant, Quick-Drying and Comfortable. Additionally, the Aura-Vent features a secondary inserted Flexible fabric that's Breathable, Impermeable, Quick-Drying and performance-based fabric that offers Strategic Ventilation and reacts to weather, engineered to keep the body Cool during the Spring and Summer nights while providing warmth in the Fall and Winter. Features thick elastic banding along the bottom and sleeves that when combined with the stretchy fabric create a perfectly tailored fit and expansion room for growth while providing a free-range of motion. Equipped with Above-Top zippers and reinforced-stitching for added durability. Great for Year-Round Full-Body Protection that's built to perform. This Dog Coat is also great for travel and folds right into an included pouch. Machine Washable. 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 22-24" - EXTRA LARGE