UTC Ultra GSP 100

The Thread That Refuses to Break (Even When You Want It To)

Let’s be honest: sometimes you need a thread that’s stronger than your patience. Enter UTC Ultra GSP 100, the gel-spun polyethylene thread that’s become the go-to for tyers who demand serious strength without the bulk.

Whether you’re lashing down bucktail on a Clouser, spinning deer hair for bass bugs, or building up durable saltwater patterns, this thread delivers exceptional tensile strength with a remarkably fine diameter. It’s the kind of thread that lets you crank down hard without second-guessing yourself.

Why Tyers Reach for GSP:

• Incredible strength-to-diameter ratio Fine profile with the holding power of much heavier thread
• Perfect for spinning hair Cuts through and compresses deer hair, elk, and other hollow fibers with ease
• Minimal bulk Build smooth, clean heads even on smaller hooks
• Exceptional durability Resists fraying and holds up to aggressive fish and repeated casting
• Versatile applications Streamers, bass bugs, saltwater flies, and any pattern where strength matters

Fair warning: GSP can be slippery, so a few extra wraps and a good whip finish tool are your friends. But once you experience the confidence of knowing your thread won’t fail mid-wrap, you’ll understand why it’s earned a permanent spot on so many tying benches.

100 denier. Available on convenient spools for extended tying sessions.