I made my skirt/boot out of Sunbrella fabric and made the windows
2 ways to try out what I liked best. Both of them have fiberglass screen in them. I looked at no-see-um netting and felt the fiberglass screen was a better choice, it was tougher fabric and had better air flow. I made a rectangular flap for a velcroed window and a half circle shape for the zippered window. The zippered one only takes one hand to close and it closes faster and more precisely than the velcro. Even though it was harder to make I like it better.
I still have work to do on it, it only has 2 windows
and I want to have 4, one on each side. I made each of the sides as separate panels (easier to handle) then did a single line of stitching holding them together to check the installed fit. I'm going to pull it back out, install the additional windows
, maybe replace the velcro window with a zippered one so they all match, then sew all the panels back together with a lapped seam for strength. Plus I need to add a pocket around the entire bottom to run a string through so it can be tied tightly after it is screwed in place,