Purchased to be used as an anchor line for a river raft. I've used it 3 times on limestone and limestone influences. The rope is beginning to fray and may be worn out. I'm not sure if this anchor line is designed to rub against rocks, but it does happen. I bought it because it was flexible, lay well on the raft, and seemed like it wouldn't "curl up". But unfortunately it starts to twist and create kinks which eventually get stuck in my pulley blocks and prevent the anchor from dropping. I think I'll avoid it (save it for kayaking where I don't use a pulley anchor system) and on lakes where it won't rub against rocks.