1. Sponge Bed Gap Filler - Lined with high density 50D sponge for high resilience, offering comfortable support that does not collapse. 2. Soft Fabric Cover - Cover is made from breathable linen fabric, soft and skin-friendly; resistant to deformation and color fading after many washes. 3. Removable & Washable - Durable zipper allows the cover to be removed easily for cleaning, helping keep the bed area clean and tidy. 4. Wide Application - Fills the gap between the mattress and headboard, wall, or footboard to prevent pillows, pets, children, and toys from slipping off the bed. Use scenarios - Scenario 1: Use between the mattress and headboard to create a continuous sleeping surface and reduce pillow slippage. - Scenario 2: Place along the gap near a wall to keep pets from slipping into the space while resting. - Scenario 3: In a children's room, use to prevent toys and small items from rolling into the gap and falling off the bed.