The cow hitch is a knot (specifically, a hitch). The cow hitch is comprised of two half-hitches tied in opposing directions.

When both the standing parts of the rope are available, the cow hitch can be tied in the following manner:

1. Form a bight and pass it through the ring from the underneath.
2. Pull the head of the bight downwards, and reach through it, grabbing both standing parts of the rope.
3. Pull both standing parts of the rope through the bight.

Knots