Please follow this guide if either of the knots in your Tree Strap's white spectra cord has been pulled through the whoopie sling.

Here’s the tool we use to assemble our whoopie slings. Try to find wire of comparable thickness.

Start by tying a new stopper knot where the old one failed. You can keep the old one tied or untie it if you can. The following image does a great job of describing how to tie the “Ashley Stopper Knot,” which is what we’ll be using.

It’s difficult to get the new stopper knot in the same position as the old. The only thing you’re changing is the range of your adjustment, so no big deal there. Just make sure you tie your knot outside the whoopie sling (the space between the two red dots - or arrows in this image).

Feed the end of the white spectra cord through your bent wire.

Contracting the spectra will open the weave of the cord. You will be inserting the threaded wire through the red dot closest to your new stopper knot.

Position the spectra that has been thread through your bent wire at the end so it is certain to be fed through the whoopie sling. There will be a natural opening in the whoopie sling where the cord was inserted previously.

Slowly feed the cord and wire through the inner channel of the spectra where the whoopie sling will form. 

Use your fingers to make sure the wire and cord stay inside the channel until they reach the other end of the whoopie sling (the red dot closest to the gray webbing marks the end of the whoopie).

When the wire and cord are fully through the whoopie sling, Unthread the cord from the wire and back the wire out of the whoopie.

You now have a functioning Whoopie Sling! You can adjust it to its shortest length and the stopper knot will prevent it pulling through. But you’re not done yet!

Tie one more stopper knot at the end of the spectra you just fed through the whoopie so it doesn’t pull through the other direction.

That’s It!