I refused to give in to the flies this year. HOWEVER, I had to reconfigure the straps and fastening design. That cost me $40. The design, material and placement of the straps is horrific. But I was able to modify it with some thread, big needles and velcro wraps. Now it works great, it is easy to put on and take off, and is secure. I do not have to worry about it coming off or undone.