Get the essentials with the Essentials Sampler pack. Four neutral colors with a pop of red and black, these 6 spools of 30 Wt. Solid Cotton Thread are perfect for your everyday essential quilting and sewing needs. Sulky 30 Wt. Cotton Thread is 1/3 thicker than 40 Wt. thread, and 2/3 thicker than 50 Wt. thread, for greater visibility, depth, and unique color interest.