I have a pair of silnylon rain pants that work just fine after seam sealing. They are a lot lighter than the PU coated variety. Unfortunately, nobody seems to make them any more (I have one of the last pair made by Brawny Gear). I've used them for winter yard work, like hedge trimming, as well as for 3-season hiking and they are amazingly sturdy. With a couple yards of Thru-Hiker's silnylon, you can sew your own.