My interest in a soft shackle came from the desire to stop our jib sheets from hanging up on the rigging when we tacked. It was becoming a problem as I was running out of crew willing to stand on the foredeck when the 155 came across in 20 knots. (Our races are short so we pick a sail and stick with it). The solution was to put eye splices on the end of the sheets and eliminate the bowline. I didn't want to splice the sheets directly to the clew so some kind of shackle was required an a metal one was out of the question. It was when a friend showed me soft shackles for another application that I realized it would solve the jib sheet hang up problem.

To the left is a picture of the soft shackle on the jib clew. The addition of the Velcro keeps the diamond knot in the center of the clew ring where it will stay out of the way of the rigging. These shackles are very strong. I did some testing and it is clear that the sheet with the eye and the soft shackle is much stronger than the sheet with the bowline. In my testing, the line broke at the bowline. You can follow the links above and see how to make them, as well as the testing that I did. I did the testing at 2/3 scale which is a little less than 1/2 the strength. The test at the bottom of the page was done to distruction of a link line made of the same Amsteel thus showing that a soft shackle is stronger than the line it is made from. On the rest of this page, I show how to use a soft shackle.