Designed for tying monster flies for freshwater or saltwater fish, the UNI BigFly Thread is made of 400-denier continuous polyester filaments. Although its 4 times as thick and 4 times as strong as UNIs 6/0 thread, its surprisingly easy to work with, twisting smoothly and lying down tight and flat as needed. Despite its strength, it will not dull your fly-tying scissors. Cancer and Reproductive Harm- www.P65Warnings.ca.gov.
