A full-body harness makes your entire body easily movable and transportable. If you are an avid climber or repeller, you will likely use a full-body harness to keep you connected to your climbing lines. A rescue worker uses a full-body harness to help someone who is unable to move. Tie a full-body harness with webbing because it is a sturdy, comfortable, wearable material that won't deteriorate under some weight.
Tie the ends of the webbing together with a tight knot. Start with at least 20 feet of webbing and adjust the length as you go through the steps, if necessary, to fit your body. Make sure the knot is fixed and doesn't loosen when pressure is applied.
Hold the webbing in wide circle behind you with the knot in the middle of your back, centred along your spine. The side of the webbing circle parallel to the knot should be resting on the back of your knees.
Bring the ends of the webbing around to your front on both sides so that you have a loop on your right and left. Bring the looped ends together into one hand.
Pull the lower band of the webbing that is accessible between your legs up and in front of you. Pass the looped ends of the webbing through loop coming up between your legs.
Pass your left arm through the left looped end of the webbing and the right arm through the right loop. Make sure the webbing is up around your shoulders.
Connect the loops of webbing around your arms with a carabiner. The carabiner should be behind you, across your shoulders.
Pull the band of webbing running horizontally across your abdomen and hook a carabiner around it. Lock the carabiner around the webbing.
Turn the carabiner to twist up any slack in the harness. Move the webbing around and keep twisting until the strap is tight around your waist. Tie the twisted portion of webbing into a knot to secure it in place.
Practice tying the body harness several times to get a good idea of how long a length of webbing you need.
Do not attempt to tie a body harness on an injured person unless you are absolutely sure you know how to do it properly.