Having a spare replacement cover or liner for your new futon dog bed is a great way to always have the bed look neat and clean and be fresh for your canine housemate. Order a spare for when the cover is in the wash or have one in another color for a quick room decor change! The Spring Brights Bolster Futon Dog Bed Cover/Liner is made of a 600-denier polyester in a soft but durable canvas weave and sturdy zippers on both ends for easy removal.