Answer:
Groove or fluting cut into surface as a decorative accent, sometimes filled with reed-shaped convex mold. The term channel refers to a grooved or recessed area, often found on upholstery or padded surfaces such as chairs, sofas, or headboards. This channel is created by stitching or tufting the fabric or leather in a way that creates a decorative or functional pattern. The channels can serve various purposes, such as enhancing the aesthetic appeal of the furniture or providing structural support and preventing the padding from shifting or bunching up over time.