So I've spent enough money on gear recently, and figured I'd just rely on a trash bag rain skirt to keep my lower body dry if needed this summer. I started with cutting up a compactor bag, punched some holes along the top for a shock cord "belt", and then realized I had made something that looked a lot like a trash bag with a built-in draw string. So next I just cut the bottom out of a tall kitchen bag. This is large enough for me to step into, is easy to tighten at the waist, and weighs just .75oz. It comes down to just below my knees, which I suppose is low enough as long as it won't be too cold. The main problem I can see is that when I try to take a large step up, the bottom opening is a little too tight and restricts my stride a bit. If I fold the bottom up to just above my knee, then it will ride up when I take such a step and so doesn't interfere with my stride.
How long and what bottom circumference do you like to use? I could use a larger bag and get more coverage, but I am tempted by the small pack size and low weight of the tall kitchen bag. Any other hints? I don't think I'll have any chance to test the bag locally before going on a trip in the PNW at the end of the month. Thanks!