UTC 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.
Made nylon over polyester because nylon will stretch and grip materials better. This allows for more uniform tension and gives the tyer the “feel” for maximum tension. Nylon is the same strength as polyester (given the same denier) and offers the added benefit of more intense colors and a larger range of colors. Because nylon stretches, it grips material tighter and makes the fly more durable.
Ultra Thread has been lightly waxed. This also limits thread build up and gives the thread a smoother, slicker feel. The added benefit is that head cement fully penetrates the thread which equals more durable flies.
it is a multifilament thread that is not bonded. Bonded threads are oval in shape and are stiff or coarse feeling. Bonded threads also build up fast which is a significant concern when tying small flies.
The spools are sized and designed to turn smoothly on standard bobbins. Each spool has a color coded end cap for product identification and to secure the tag end of the thread. In our opinion the best thread made deserves to be spooled on the best spool.