Keep your mattress clean and comfortable with the Mainstays Waterproof Fitted Soft Knit Mattress Protector. The waterproof laminate backing shields against everyday spills and stains while the soft knit fabric maintains the cozy look and feel of your mattress. This protector installs like a fitted sheet and stretches to accommodate mattresses up to 15 inches deep. Best of all, it’s machine washable for easy care!