1. Material: The inner filling is crafted from cotton linen and density sponge, offering stability and exceptional comfort to bridge the gap. Designed to ensure a comfortable sleep without feeling the space between the beds. 2. Practical: Eliminate insomnia and close the gaps between the headboard, wall, mattress, or footboard with this mattress gap pillow. The foam cushion fills the space, preventing the loss of pillows, pets, or children's toys. 3. Wide Application: This durable bed gap filler delivers comfort, support, and convenience. It can serve as a double bed bridge, an armrest/headrest for wooden sofas, or bridge the gap between the headboard, wall, and mattress. 4. Removable Zipper: The cushion cover features a zipper design for easy removal and reattachment, simplifying washing and replacement. The zipper is userfriendly, convenient, and practical. The sofa armrest cushion cover can be handwashed or machinewashed.