Hi all, thanks for your responses.
It appears that there is no commercially available simple, lightweight fabric (uninsulated) overboot on the market. I wanted to be able to wear lightweight trail runners for snowshoeing and keep my feet warm and dry. In response to my previous post about Gore-Tex shoes staying dry, several readers insisted that they do not leak, but I have yet to find GTX shoes that do not wet through in wet snow. I will keep looking.
I have tried Neos overboots, but they are heavy and accumulate a lot of condensation inside.
EH, I tried putting my trail runners into a pair of size XL ID vapor barrier socks, and they barely fit. With the VB socks, I'm concerned about my feet getting damp from sweat, then getting cold.
I tried Tyvek clean room overboots, and found that the Tyvek wets through, and the vinyl soles are not durable enough. I am going to try DuPont's new "Gripper" overboots, which seem to have a tougher vinyl sole, and I could also put duct tape on the soles to make them more durable.
I have some old GTX full boot gaiters that date back to the late 70's. I am thinking of sewing a sole into them and trying that. I would need to put something on the soles to give them more traction.
One problem with wearing LW trail runners for snowshoeing is that my feet get cold easily. I could wear neoprene overboots over my shoes for extra warmth. There are a lot of those around for bicyclers and snowshoers.
Thanks for all your ideas. If you have any more suggestions, let me know. Will