Shades of greys illuminate this spiral weave pattern that can't help but draw positive attention from your guests. Ultrasonic quilting fuses the 3 layers to form an unbreakable weld. Pinsonic quilting is a process of joining the face, fill, and backing materials using an ultrasonic heat weld rather than thread. The Result: A stronger bond of the 3 materials; no pin holes in the fabric, nor threads that can fray or come loose. Priced individually and sold in cartons of 4.