The Perfect Little Box of Neutrals by Pat Sloan thread kit of 10 small (220 yard) spools of 50 Weight 100% cotton Mako thread from Aurifil. Includes the following colors: 2311, 2692, 2340, 2370, 5011, 2312, 2372, 2610, 1158, 2600. Long staple Egyptian cotton is the best in the world! The 50 weight is the finest of the Mako threads and is very smooth and strong. 100% mercerized cotton.