I'd be worried about breathability, heat, sweat being trapped, and rubbing. Beyond that, they aren't made to stand up to any sort of abuse - I'm sure they would tear very quickly, and I'm fairly sure they wouldn't have any effect on pests like mosquitos.
Well my horse doesn't mind them at all..which is nice..I let her wear them in her stall....I will get a fly sheet..just was seeing if it was a good idea. Thanks!
Also..I have the HARDEST time finding a fly sheet in my horses size..she needs a 70 inch,.
Well I know it's not an odd size. I should rephrase this but I meant at our feed/horse stores. I had one I really liked but it was a bit snug.I would even do a 72"...maybe a lot of horses are the same size as mine.
I cannot afford a $99 sheet but thank you for the recommendation. I think I will try a Kool coat as it provides UV rayz protection. I will also have to get a new fly mask with the long nose.