Swirls variegated thread is the newest inspiration in the Maxi-Lock world of color. It is a durable 50 weight, 100% spun polyester thread. It will withstand the high speeds and tensions that are unique to serging while giving excellent seam strength, mildew and UV light tolerance, as well as shrink and abrasion resistance. Ideal for light to medium weight structured fabrics. 3000 yards per cone. Rocket Pop- Variegated in Red, White and Blue.