Milliard Universal Folding Bed Storage Cover, Fits 31-Inch Beds Thicker and More Durable Keeps dust, pollen, pet dander, and other airborne pollutants off your fresh, clean bed. Just slip it over your folded bed. Intended for 'single' or cot sized folding beds - 31" with a snug fit for a compact and sleek look. Please note that the fit will vary depending on the size of your folding bed. Typically, the cover will fit well over poly-deck (trampoline based) folding beds, and not over wooden-slat folding beds of the same size. Also available in 38 inch