This is some new stuff I am trying out. It is not monofiliment, it is supposed to be made up of multiple (hundred+) strands fused together. It is very thin, very slick, and has minimal stretch. I have flown on it a couple of times, and will keep everyone posted on how it works out. It is available in 1,2,3,4,8,10 and 12 lb test. I am flying on the 8 lb, and its diameter is .006"!