Fuji's Ultra Poly Thread is made of specialized polyester that accepts finish beautifully and has the ability to withstand the harsh saltwater environment, UV light, 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. You can count on consistent colors and exact performance from spool to spool. 100 Meter Spool.