Ultra Thread has been engineered as a fly tying thread from the beginning. It is not an "off the shelf" thread as are many others. All of Ultra Thread's characteristics were carefully chosen to enhance its tying performance.
The 140 is excellent for the majority of flies, it is the perfect choice for size 2 - 16 flies. Due to its vibrant sheen and excellent color retention, it is a good substitute for floss on small flies.
Available in 9 colors.