7 SIZE OPTIONS AND COMPATIBILITY 7 size options to meet relaxation needs in different environments. Fits standard mattress widths including Twin, Full, Queen, and California King. The large triangular wedge pillow aligns with the width of the mattress and can function as a headboard or as sofa pillows. TRIANGULAR WEDGE SHAPE DESIGN The distinctive triangular wedge offers support and elevates the upper body for a comfortable resting position. It provides ergonomic uplift while adding a stylish accent to your bedroom or living room. It can help promote a comfortable posture during use. MATERIALS The cover is smooth, soft, breathable, and wear resistant. The backrest pillow insert is filled with PP cotton for good rebound, soft, durable, and resistant to deformation over time. This option is softer than memory foam and designed for long term use. REMOVABLE COVER AND POCKET Features a tufted button design and a removable pillow cover for easy cleaning. It can be used as a decorative element at the head of the bed or on a sofa, or placed wherever you want to rest. A convenient One Side Pocket provides space for small items.