Last year I tried many different materials and I found the best was just regular black matte screen that you would have in a window or screen door. You could see it during the day but nothing at night. I didn't have mine in the wife open but I clipped it to a metal bar and then let it just hang down to the ground. If it was windy I pegged the bottom into the ground with tent pegs and it worked. With screen being thick it doesnt wrinkle and it looked pretty good.