Size options and fit 7 size options available to fit Twin, Full, Queen, and California King mattresses, to meet your relaxation needs in different environments. The large triangular wedge pillow aligns with the width of the mattress and can also function as a headboard or a decorative pillow for a sofa. Triangular wedge design and function The unique triangular wedge shape provides support and elevation for the upper body, supporting comfortable sitting or reclining. It helps prevent common posturerelated discomfort and serves as a stylish accent for your bedroom or living room. Materials and construction materials: the headboard wedge pillow uses a smooth, soft, breathable, and wearresistant cover. The pillow insert is filled with PP cotton, offering good rebound, softness, durability, and longterm resilience; it is softer than memory foam and not easy to deform over time. Removable cover and practical features Removable pillow cover with a tufted button design for a clean, stylish look. The cover is easy to remove and clean. The pillow can function as home decor at the head of the bed or on a sofa, or anywhere you want to rest. A practical oneside pocket provides convenient storage for small items. Use scenarios In bed: use as a backrest while reading, watching TV, or resting to support the upper body and neck. On a sofa or daybed: use as a back cushion for lounging, gaming, or casual seating. As decor: place at the head of the bed or on a sofa to enhance style while offering comfortable support and a convenient pocket for small belongings.