Kevlar Thread – the same material used to construct bulletproof vests – is unbelievably strong and more than able to withstand fish-fighting abuse.
UTC 200 Denier Kevlar Thread - Natural Yellow - AvidMax
Thread – Little Fort Fly and Tackle
UTC Vinyl D Rib - Hunter Banks Fly Fishing
UTC Kevlar 200 Denier Fly Tying Thread - The Trout Spot
Threads, Tinsels & Wire
This kevlar thread is very, very, very tough, and will stand up to a lot of abusive fish strikes.
UTC Kevlar - Natural
Thread – Little Fort Fly and Tackle
UTC Kevlar Thread 200 Denier, natural, Fly Tying
Kevlar Thread, Kevlar Fiber yarn10meters (1000D) : : Tools & Home Improvement
Going Fishing - Fly Tying - Thread/Wire/Tinsel Inventory