Cocoon bobbins are used on schiffli embroidery & multi-needle lockstitch quilting machines equiped with shuttles. Made of cotton, poly/poly core spun, spun polyester, continuous filament nylon 6.6 and Polyester ,Textured Polyester Yarn and other specialty products . Applications: Mattresses,Quilts,Slee etc. Packing: 2.5kgs/bag, 20kgs/carton, or as customers requested