[JBo]

The second post is close, but depending on the splash of your body, you may not have enough height. A thin fibre glass bow running f to r solves it when driving or when stationary. Tension alone will hold it bowed , if cut to the right length. No zipper means it pretty much cannot be used when driving . A zipper with an over and/or under lay; like pants zipper, allows you to zip in half and drive with it in place ; deflecting rain. I have done it in my AK, so I know it works. The tonneau set up this way is also helpful in cool weather to keep a driver warm.