Triangular Backrest Cushion

180 cm ergonomic triangular wedge headboard back cushion made of cozy striped corduroy fabric with dense polyester fiber filling. Curved contour perfectly fits human spinal curve, delivering targeted support for shoulders, entire back and lumbar area to relieve muscle soreness caused by long-time reading, mobile scrolling and leaning rest. Segmented units connect via metal zippers, allowing flexible length combination to fit twin, full, queen beds, sofas and daybeds. Fixed tufted buttons prevent inner filler shifting; side storage pocket holds cell phones, glasses and remotes conveniently. Vacuum compressed for shipping, needs 24-48 hours ventilation to fully rebound. Detachable zipper cover supports machine washing, breathable, wear-resistant, ideal for bedroom leisure, sofa lounging and leg elevation relaxation.