Sponge Bed Gap Filler - 50D high-density sponge core provides high resilience and comfortable support, and it will not collapse over time. - Soft fabric cover made from breathable linen is gentle on the skin and remains soft. It resists deformation and color fading after many washes. - Removable and washable cover with a durable zipper for easy cleaning and long-lasting bed cleanliness. - Wide application: fills the gap between the mattress and the headboard, wall, or footboard to prevent pillows, pets, children, and toys from slipping off the bed. Use scenarios - In a master or guest room, place the filler to bridge the gap between the mattress and the headboard for a neat sleeping surface and to stop pillows from slipping into the gap. - For households with pets or small children, the filler helps keep them from rolling into the gap during sleep or play. - When the bed is positioned against a wall or near a footboard, use the filler to prevent items such as toys or blankets from slipping down and getting lost in the gap.