Stop sacrificing realism to bulky thread! UTC Ultra Thread (70 Denier) is the perfect, low-profile foundation for all your small to medium-sized patterns. This thread is thin enough to practically vanish on the hook shank, but it packs enough hidden strength to cinch down the toughest materials without snapping. It lays flat, wraps smoothly, and lets you build those delicate micro-bodies without unnecessary bulk. When precision is your top priority, this 70 denier thread is the invisible powerhouse you need in your fly tying arsenal.