Brand new, premium performance 100% Fluorocarbon mainline, made in Japan for the ultimate quality. Fast sinking - lies flat on the bottom for ultimate presentation at all times. Nearly invisible under water. The refractive index of 1.42 is very close to that of water, making Mirage almost impossible for fish to spot even in the clearest conditions. High-tech low memory formula gives unparalleled casting performance. Ultimate tensile and knot strength: Mirge has consistently out-performed all other fluorocarbon mainlines during testing. Unlike monofilaments, fluorocarbon lines tend to work best with a blood knot. Low stretch - offers improved bite indication and a crisp precise feel. Higher abrasion resistance than other premium fluorocarbon mainlines. Non hydroscopic - does not absorb water that causes monofilament lines to lose knot strength after long periods immersed in water. UV Resistant - does not deteriorate in sunlight. Available on 100m Spools in 4lb, 5.5lb, 7lb, 8.5lb, 10lb, 12lb, 16lb, 18lb, 20lb, 25lb & 30lb and 200m Spools in 12lb, 14lb & 16lb.