Is your horse out by itself or with others?
Fly sheets, I like the one I have from weatherbeeta, it came with a neck cover as well. It's a thicker weave, but doesn't tear easily.
If your horse is out by himself or with others that don't like to play tag with his cloths, the Amigo sheets are awesome! Easy to wash, light weight, and come with a belly guard.
My favorite turnout is by Shires. It's lasted 5+ years with tough turnout buddies. If you have the money, Rambo is also a great buy.
If your horse says no, you either asked the wrong question or asked the question wrong
And God took a handful of southerly wind, blew His breath over it and created the horse