materials: The shell is made of soft, breathable cotton linen. The multi functional daybed backrest pillow has a breathable cover with a delicate touch and wear resistance. The triangular pillow insert is filled with elastic pearl cotton for good rebound and softness. Removable cover with durable zipper: A metal zipper design allows easy cleaning and longlasting use. This large headboard pillow features tufted buttons to enhance a three dimensional look and reflect thoughtful ergonomics. A small pocket on the side holds a mobile phone, TV remote, button, or pen. Ergonomic reading pillow: The large bolster wedge is designed to support the natural curvature of the back and provide elevation for the upper body. It helps reduce back and shoulder stress and offers proper support while reading or resting. Headboard alternative and bed conversion: The oversized triangle pillow bridges the gap between wall and mattress, serving as a backrest for comfort and a sturdy headboard. It can convert a day bed to a sofa or a twin bed to a sofa bed. It also protects children as a cushion pillow and can function as a caravan headboard. The bed backrest fits any standard bed. Use scenarios: Ideal for reading in bed with stable back support; for turning a day bed into a sofa for lounging or accommodating guests; useful as a protective, childfriendly cushion during travel or in caravans. It provides a versatile solution for bedrooms of any standard bed setup.