4 USE MODES - The gap filler is optimized and upgraded to 4 use modes according to customers' needs, making it suitable for most beds. The uniquely designed mattress gap filler allows you to freely adjust the gap filling method, and the triangles on the wedge pillow can be flipped into a rectangular pillow. Cover the gap between the bed and the wall or add a cover to fit your expectations perfectly. PERFECT WEDGE PILLOW - If you're struggling with losing items in the bed frame gap behind your pillow, our mattress gap filler is made for you! Our wedge pillow measures Queen:60"x6.3"x6.3" /king:76"x6.3"x6.3". This king size bed gap filler can fill gaps from 0 -7 inches, king size bed wedge pillow can perfectly fill the gap between the headboard or wall and mattress, preventing pillows, cell phones, toys, remotes, or other belongings from falling out of bed. PREMIUM HIGH DENSITY FOAM - FOXTUEL king size bed pillow wedge for headboard gap is made of premium 25D high density foam wedge, which is strong enough to hold back the gap and keep its original shape for a long time. It also fills the bed gap effectively and provides comfortable support for your head and neck for a good night's sleep. The pillow wedge takes up less space on the bed and also helps some customers to reduce the number of pillows on the bed for a neater bed.The bolster pillowcase is made of high-grade, breathable, soft material that is Oeko-tex certified. The pillowcase has a zipper design and is removable for easy machine washing. BREATHABLE & REMOVABLE COVER - Included is a soft, breathable bolster pillowcase made from Oeko-Tex certified material. The zippered cover is easily removable and machine washable, ensuring simple maintenance and long-lasting freshness. - Included is a soft, breathable bolster pillowcase made from Oeko-Tex certified material. The zippered cover is easily removable and machine washable, ensuring simple maintenance and long-lasting freshness. TIP: 24-48 HOURS FULLY INFLATED - Our headboard wedge pillow gaps are compressed during shipment, so it takes 24-48 hours to return to its original shape after unpacking.FOXTUEL wedge headboard pillows retain their shape for a long period of time without deforming. 4 Modes King Size Wedge Pillow Headboard for Bed Gap, Foldable Bed Wedge Pillow Gap Filler, Mattress Gap Filler, Multi Functional Long Pillow for Bed Triangle Pillow, Fill The Gap (0-7") Between Headboard and Mattress, Dark Grey