ANDE Fluorocarbon is 100% fluorocarbon with all the properties that you expect: superb abrasion resistance, good knot strength, no water absorption, and a fast, consistent sink rate. With fluorocarbon's lower-reflective index, it is invisible under water.
Fluorocarbon comes in tests from 10 to 150 pound in clear and 20 to 60 pound in pink. It is available on 50-yard wrist skeins and one-pound spools.
Remember, it's ANDE quality at a very reasonable price.