I have a 69" Saxon turnout sheet for sale. I believe it is 600D. Nylon inner layer, all leg straps on it, fleece on the withers. I used it maybe 5-6 times. Just washed it, and will respray it with waterproofing before I ship it out. Asking $40. I another large one that I have used 5 seasons and still no rips on it, so they are pretty durable sheets.
I will be going out of town tommorrow and won't be home until the 28th, so can't ship it out until after then (and don't be offended it I don't respond to you before then!)