The ultimate in low-visibility, Fireline Fused Crystal line is clear enough to fish like a monofilament, yet tough enough to be called the world's strongest superline. Engineered with patented thermal fusion technology, this line is thinner, stronger, and more sensitive than monofilament. Supple enough to handle the coldest weather, Fireline Fused Crystal line casts longer and ties better knots than conventional braids. Delivers maximum power, lure actions, and presentations. Ultra-thin diameter works perfectly with micro bait for incredible action without spooking the fish.