Originally Posted by Kasuko
Is this the twisted nylon version?
Yes, it is the twisted line. Some of the braided stuff that bubba mentions (above) would be awesome, but I've never seen it. If your prussics aren't holding you might try additional loops in it. Slippery as the twisted nylon is, a taught-line hitch holds well, and again, you can always add an extra loop or two to make extra sure.