In order to hang a hammock outdoor between trees, you need some hammock gear to set this up. Other than this gear for hammock, you can also use knot for hanging hammock. You need to make sure that the knot you make is quite strong and can hold the hammock well. It should be kind of knot that can be tied easily, hold the hammock appropriately, and can be untie quickly when you need it. To provide this knot, some of you will need to learn to master it. There are several types of knot that can be used for many purposes such as bowline, taut line hitch, prusik knot, etc. To hang hammock you can use lark’s head knot or sheet bend.