I posted a question last week about zipper windows. I was wondering if anyone other than myself has found them annoying. I got a couple of responses saying get full doors or get the sliding windows-but those are too expensive. So I have developed a product that I will soon be marketing. It's $24.95 and it attaches to your half-door and clips onto the top of your zipper window to secure it. So now you can open your zipper window half-way without it flappin' in your face! It doesn't damage your window or hinder viewing. How many of you would be interested in a product like this?