Sew Easy 50/3 Quilting Thread The 50/3 variegated coloured thread creates a pleasing effect on sewn quilts. 48 colours are available in a 732m (800yd) spool length. Sew Easy Quilting Threads are made from 100% Premium Pima Cotton Threads. There are no man-made substances in them! This durable thread won? ÇÖt twist like other major brands. It is extremely strong and has been tested on high speed Janome and Brother machines, as well as Gammill and Handi Quilter machines.