The first translucent Super Line- Ultra Lo-Vis. Thermally fused FireLine Crystal is smoother than ever - right out of the package! The smooth handling superline - optimized for spinning reels. Incredibly thin diameter for unbelievable lure action and low visibility. Incredibly strong - Microfused Dyneema PE fibers are 3 to 4 times stronger than mono. Superb sensitivity - telegraphic feel for structure and strikes