A prusik loop is a piece of nylon cordage with its ends tied together with a double fisherman’s knot. For rock climbing and canyoneering it is 4ft  in length and 6mm in diameter. The loop is tied with a double fisherman’s knot with 3 inches of tail.

Appropriate uses rock climbing and canyoneering:

• Auto Block
• Klemheist Hitch
• Prusik Hitch