Battle Shield Umbrella
This is a trekking pole based 1.6 ounce umbrella. It quickly converts your trekking poles into a 35" x 35" umbrella to protect you from sun or precipitation. It can be held in one hand like a traditional umbrella or secured loosely on your head for hands free use in calm air. The rubberized foil coating reflects the sun's heat away and is completely waterproof. Currently this is set up for use with adjustable length poles, but there may be a mod coming for fixed length poles.
Obviously the one drawback here is that you can't use your trekking poles as poles when in umbrella mode. However, there are some scenarios when my desire to not use poles and my desire to have an umbrella coincide. For instance an exposed road walk in the sun. I'd just be dragging the poles along anyway. Might as well turn them into full sun protection. Often the times the hardest downpours happen when you are out exposed on flatter terrain. Again, I'm not really using the poles much in this scenario so might as well turn them into rain protection. When you are in rugged terrain where you would normally use poles and heavy rain you'll have to decide whether you'd rather have the poles or have the umbrella, but for an addition of only 1.6 ounces to your kit it might be worth going without poles during rainy weather. On windy ridge lines, like any umbrella, this isn't ideal and you'd be better off with a different type of rain protection. Unlike a traditional umbrella, the Battle Shield's side profile is completely flat. So if you are going through brush it can be turned vertical and flat so it'll slip right through.
It can be held in one hand like a normal umbrella with the trekking poles laid over your shoulder and the umbrella at an angle. The coverage is 35" x 35" so the angle still provides a lot of protection. By painting a little silicone in the center the whole umbrella can be worn on your head with your hands free by resting the silicone coated portion on top of your head and the cross of the poles behind your neck. The silicone is sticky so it stays there pretty well, even when light jogging, but won't stay there in winds....nor would you want it to!