Increase mattress comfort and protect your bed from carelessness and accidents that can damage waterbed mattresses and cause leakage. Pad is the best way to get this level of protection. Our Mattress pad will also increase heater efficiency by adding an additional cleanable layer that holds bed temperature steady and saves on electric and gas bills. Machine Wash & Cool Dry For Best Results. California King Anchor Band fits California King Only. It fits Cal King Wood frame Waterbeds and Cal King Traditional Mattresses up to approximately 12-14 inches Deep.