Tired of stuff falling into the crack between your bed and the wall or between two mattresses? This custom wedge filler is the solution! You can order it in a ton of specific lengths (like 36\, 59\, 72\, etc.) to perfectly fit your Twin, Double, Queen, or King bed gap. It's made with a high-density 45D sponge foam insert that provides great support, and it comes with a removable, washable linen cover (with a zipper). The design actually tucks under the mattress to stay put, not just sit on top. It's fantastic for creating a safer sleep space for kids, connecting beds together, or just making your bedroom look tidier. It'll arrive vacuum-packed, so let it fluff up for a day or two. Choose 'Customize Now' to pick your exact size. Fill Material: 45D High-Density Foam. Cover: Removable, washable linen. Customizable Lengths.