The texture of the thick double-coat is important in protecting the dog from cold water and icy conditions. The oil in the harsh outer coat and woolly undercoat resists water, keeping the dog dry and warm. Maintenance of the coat is minimal and mainly consists of brushing with a short-tooth brush once a week. It is difficult to get a Chesapeake Bay Retriever thoroughly wet, but they should be bathed every 3–4 months using a suitably mild shampoo, then dried thoroughly. Brushing or bathing more often can ruin the texture since it strips the protective oil from the coat and may even remove the undercoat. The color of the coat must be similar to the working surroundings. Any color of brown, sedge or deadgrass is acceptable and one color is not preferred over another. The American Chesapeake Club includes a discussion on color: