material. It's tough hard outer layer protects the line from rough country and toothy critters. Unseen handles all of this without becoming stiff and unwieldy. Available in 50m spools between 3 and 20lb, Sufix Unseen will keep you connected! Fluorocarbon's other great benefit is that the line will never absorb water, no matter how long it's submerged. This keeps the line's structural integrity in top condition, providing unparalleled knot and shock strength.