Take bedding, for example: it generally consists of two parts-the filling and the outer textile covering-with the filling further categorized into battings (bonded layers) and loose fibers.
Bedding cores made of loose fibers lack a fixed structure or shape; they tend to shift, clump together, and result in uneven thickness. To secure the outer fabric to the inner core and ensure uniform thickness, the two layers are stitched together-whether in parallel straight lines or decorative patterns (including stitch-bonding). This process, which enhances both aesthetic appeal and functionality, is known as quilting.