Overhand Follow Through

The overhand follow through is used to tie a loop in the end of a piece of webbing around an object such as a ring or harness.

Tie an overhand knot a foot or two from the end of the webbing. Leave it loose.
Wrap the short end around the ring or object.
Follow the tail back through the overhand knot so that both ends of the webbing come out of the same side of the knot and the loop comes out the other.

Canyoneering 101