[UPDATED DESIGN BED SPACE FILLER] With the mattress seam tightly fit, do not have to worry about Bed Gap Filler shift, really fill the bed seams, rather than like other similar products can only cover up. [HIGH QUALITY MATERIAL] Mattress Extender cover is made of premium quality linen fabric, breathable, delicate touch; filler is filled with upgraded environmental-friendly foam, excellent density and high resilience could give you long-lasting comfort when leaning against the headboard. [8 MATTRESS WIDTHS] 39", 47", 54", 60", 70", 72", 76", 78" applied in Twin/Twin XL/Full/Queen/Cal King/King Bed, also works great as a soft elongated foam pillow for other bed sizes when placed against the wall. You could also customize bed gap filler for crib beds. Product Size Error:±0.3in. [MULTIPLE APPLICATION] Bed Gap Filler is designed to provide outstanding comfort and support as well as a convenience. It can not only act as arm/head support for a wooden sofa, but also close the gap between your headboard or wall and bed mattress. Putting this bed gap filler during bed gap or sofa gap, will reduce the trouble of dropping things for you, and have a better sleep. [PREMIUM CUSTOMER SERVICE] We assure you that all our products are strictly inspected before packing. But there are still some factors that may cause product defects. If you encounter any problems, please contact our customer service team, we will give you a satisfactory after-sales service. Soft&Durable:
The pillowcase is made of breathable polyester pongee fabric, soft and comfortable.
Removable &Zipper Design: Removable pillowcase with zipper, easy to clean.It is pilling free and machine washable, making it the perfect choice for a restful night's sleep.
High Density Memory Foam: The sponge has high density and hardness, it will not collapse after a long time of use, and it can play its functionality well. With a breathable, hypoallergenic design, this headboard pillow is perfect for insomniacs and will help support the bed pillow to provide you with a more comfortable night's sleep.

Warm Tip:
Due to the properties of the sponge, it may take up to 48-72 hours to fully expand after opening the package.