DD Hammocks Whoopie SlingsThese DD Whoopie Slings attach your hammock to your tree huggers safely and securely and with the minimum of effort. At one side of the sling is a small fixed loop, that attaches to your hammock. At the other end is a significantly larger adjustable loop. Once attached to the hammock the sling can be easily adjusted depending on how tight or how much slack is preferred. The large adjustable loop end attaches to your tree hugger with a carabiner. Hard