UNI-Stretch Thread is a versatile, stretchy fly tying material designed to create smooth, clean, and durable fly bodies without the fraying commonly found in traditional floss. Made from continuous-filament nylon with high elasticity, this 270-denier material lays flat, compresses under tension, and grips securely to the hook shank for precise body shaping.
Ideal for chironomids, nymphs, scuds, salmon flies, steelhead patterns, and trout flies, UNI-Stretch is especially useful when building tapered underbodies, bright tags, clean butts, and gill-style accents. It can be used wide and flat for smooth coverage or twisted into a cord-like profile for segmentation, making it a highly adaptable material for both classic and modern fly tying.
UNI-Stretch Thread is a great alternative to floss when you want smooth color coverage with less fraying and more control. Its stretch allows it to compress neatly on the hook, making it easy to build clean tapers and polished bodies. We especially like it for chironomids, scuds, and nymphs where a slim, smooth underbody makes a big difference in the finished fly.
UNI-Stretch Thread is ideal for tying:
Twist or spin your bobbin to control the width of UNI-Stretch. Let it flatten out for smooth body coverage, or twist it tighter to create a corded effect for segmentation and added body thickness. Use light, controlled tension when building smaller flies to avoid crowding the hook eye.
For custom color effects, white or bright UNI-Stretch can be tinted with permanent markers before sealing the body with UV resin, head cement, or a clear protective coating.
