X-Large fits large to huge size dog breeds (Newfoundland, Great Pyrenees, Chow Chow, Bully breeds, Golden Retriever, Rottweiler, Mastiff, etc.) The Happy Hoodie is a soft, expandable, gentle compression fabric band that relieves anxiety and calms dogs during stressful situations such as force drying, thunderstorms, fireworks, toenail clipping and more. The Happy Hoodie was originally created to calm and protect dogs from the loud noise and high-pressured air associated with force drying in the grooming salon. Since then the Happy Hoodie has proved to be so effective at relieving anxiety that it is now used to help calm upset pets in many situations, whether it's at the grooming salon or in the home.- Swaddling effect CALMS upset, disagreeable pets under many circumstances. Contributes to the safety of both the pet and the groomer or owner. Saves valuable time in the grooming salon. Helps to protect a pet's hearing. Speeds up drying time by wicking water from the ears. Requires minimal time, effort, and cost to use. Fully washable and can last through hundreds of uses. Accommodate almost all sizes of dogs, as well as cats!