While our Old Bones Memory Foam Dog Beds are guaranteed to last for 10 years, the covers may wear out a little sooner.  Alternately, you may decide that you desire one cover for warm weather and another for cooler temperatures.  In either case, we offer replacement covers for our Old Bones beds.  Choose from All Fleece, Nylon/Fleece, or All Nylon.  Water-resistant nylon available in Hunter Green or Burgundy.