Our Winter White Fashion Parka contains Thinsulate thermal heat retention technology specially inserted between the fabric. Features matching tone-on-tone inner fleece fabric. The attention to detail along the backside is unique, and the ribbed sleeves and inner fleece all match the details along the back. Your pet will stay warmer through those harsh cold weather conditions. Sizing Guide: From back of neck to tail area (in inches) - | 8": X-Small | 10-12": Small | 14-16": Medium | 18-20": Large | 22-24": X-Large.