The umbrella is a custom tool used so during a storm, you may work outdoors without the loss of health.
How to make an umbrellaEdit
To make one, you must strap 1 plank, or a crafted handle vertically to your back, and add a small or meduim folaige to the top, thus acting like an umbrella.
If you are in a raft and there is a storm you should make a umbrella/sheltered boat. All you need is a medium wood or plank. Then place 1 medium wood or 1 plank at the front of your boat vertically then put one medium foilage horizontally to the top, thus making a umbrella boat. If you are on a Schooner, you can place a few Medium Folaiges on the crows nest.