Fuji’s new Ultra Poly thread is made of a specialized polyester that accepts finish beautifully and resists UV, aging and abrasion better than Nylon. Fuji Ultra Poly NOCP requires no color preserver to maintain its color. Ultra Poly is a pleasure to use and brings a bright, colorfast finish to any rod building project. And, thanks to the high-tech facility manufacturing Ultra Poly, you can count on consistent colors and exact performance from spool to spool.