1. Vacuum Packaging: The support cushion is vacuumpacked. To open, gently scratch the surface of the packaging. After opening, lightly tap it and let it air dry in sunlight or a wellventilated area. It takes about 24–48 hours for the cushion to fully expand. 2. Size of Bed Gap Filler: Our headboard bed gap filler fits various mattress widths, such as 39 inches, 54 inches, 59 inches, 71 inches, and mattress sizes like Twin, Full, Queen, Cal King, and King. 3. Practical and Aesthetic: The mattress gap filler is specifically designed for gaps between beds and headboards or walls, mattress extensions, wall edges, or between beds and mattresses. Placing this bed gap cushion in the bed seam or sofa seam can reduce the problem of items falling and make your home more beautiful. 4. Removable and Washable Cover: The filling is made of breathable linen fabric, which is soft and skinfriendly. The cover features a sturdy zipper, making it removable and easy to clean. The zipper securely closes the cushion.