If you have an Ocean State Job Lot store near you, that's the place to get the clear shower curtains. They are 6'x6', very heavy duty clear vinyl, and cost about $4 each. I put them up with screws with a washer so it won't rip through. The ones I used last winter are still in good condition, so I should get at least 2 winters from them. It kept the run much warmer since there was no wind, and I found my waterers, which used to freeze by noon now stayed unfrozen all day.
