I use braided mason line as a ridge line. Hang your hammock properly at 25 to 30 deg and the stress on the ridgeline is quite light. I can reach up and twist the line through about 90 degrees without difficulty. Use a shallow angle and you load up the ridgeline enormously, in which case you would need dyneema or similar. So far I have not had a ridge line break, but I am really careful about the hang angleAttached is a chart of the stresses involved. Here is a link to a vid by Warbonnet guy showing just how you should hang your hammock.