The Pet Life Metallic Parka Dog Coat contains Thinsulate thermal heat retention technology as an inner shell specially inserted between the fabric. This pet coat features matching tone-on-tone inner fleece fabrics, a faux fur removable zip-off hood, a leash slit, and belly-velcro closures for easier on and off access. This coat will keep your pet warmer during those harsher cold weather condition. Available in multiple sizes and colors. Sizing Guide: From Back of Neck to Tail area ("In" Inches) 8 in. : EXTRA SMALL 10-12 in.: SMALL 14-16 in.: MEDIUM 18-20 in.: LARGE 22-24 in.: EXTRA LARGE Inner Lined with 3M Thinsulate insulation technology Removable Hood Belly Velcro for easy on off access Available in multiple sizes and colors