While not required, it is recommended that you cover your mattress with a fitted mattress protector to keep your mattress clean and fresh. There are a variety of mattress protectors available in stores and online – we recommend one that is moisture resistant, breathable and machine washable. Features range from very basic to liquid resistant to waterproof. Select the level of protection best for you. For example, if you’re concerned about spills or accidents with pets and small children, a protector with greater liquid resistance would be a great selection.