The somerville bowline is the rockstar knot that NEVER slips.This is also a single column, and begins similarly, but unlike the square knot, this one is non-collapsible.

Once again, you’ll fold your rope in half to find the middle of the rope, or the “bight”.

Begin by holding rope from the bight and wrap twice around the wrists, and make sure they are facing each other to protect the inner wrist, and that you start below the wrist bone. You’ll end up with 3 wraps - bight, middle, tail. The tail in this instance is the rest of the rope. Make sure all 3 wraps are straight and not overlapping.

Form a loop around the bight with the tail, making sure the running end of the tail is facing the wrists. Here, you want to make sure your desired tension is set, because you won’t be able to correct this one once you tie the knot.

Pull the bight through the loop you created and over the tail.

Then, pull the bight under all the wraps and back up through the loop.

Hold the bight - but don’t pull. Then only pull the tail to tighten down the knot. Hold the knot and pull vertically from both directions to secure the knot.

Because this knot is super secure, you can explore all your rope play fantasies without unraveling.