The Pet Life Metallic Ski Parka Dog Coat boasts of an inner lining with Thinsulate Thermal Heat Retention Technology inserted between the layers of fabric to provide your pet with maximum protection from the cold. Along with this, it has matching Tone-on-Tone Inner Fleece Fabrics that will keep your pet warm and comfortable. This Insulated Dog Jacket features a Faux Fur Removable Zip-Off Hood and Usable Back Pockets. In addition, this Pet Coat Features Belly-Velcro closures making them easy to wear. They are also available in a range of 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