I have a friend who does blanket rehabbing professionally, and is smart and OCD.
Her picks among the brands mentioned:
Horze Avalanche
Shires
Stuff she sees fail:
Mios and Amigos
Dover brand blanket (though Dover staff tells me they have improved their blankets in recent years)
All things being equal, newer blankets at all price points are made with worse waterproofing and worse thread than in years past. So when folks tell you that their 10-year-old blanket is going strong, know that’s not information you can use in buying new now.
My picks:
Back in the day, Double D made a helluva blanket. I can’t speak to waterproofing, but if those quarter horse-cut blankets fit mine animals, I’d give them a shot.
I have liked the Saxons that are made for Chick’s Saddlery.
I would also try a Scheider’s, based on what I have seen from those blankets on horses in the rainy Pacific Northwest. If I thought Smartpak would be great with their warrantee, I’d try one of those.
The bottom line is that when I buy anything other than Top Shelf, I’m also making a plan to do my own wash-in waterproofing and spray-on waterproofing. At some point, a blanket becomes a surface to put more waterproofing on. Unfortunately, that’s happening sooner with modern blankets than with the older ones that had better quality waterproofing from the manufacturer.
My blanket lady says that old blankets start to fail as the sun shrinks the threads and the fabric itself becomes porous. In this case, her very last go-to product is a spray-on wax. But it’s a very “fussy product” in her words; it takes an air-compressor and commercial sprayer to use. I’ll try to get the name of the wax stuff if you guys would like…
All of this being said, and the world going to sh!te, it might make sense to start buying cheaper rain sheets, waterproofing them more often and not expecting them to last.
Denier is about resistance to snags and teeth, not waterproofness until you get to low thread counts like 600 or less. Those, IMO, aren’t meant for turnouts at all or for providing waterproofness. But you can find those kinds of blankets made and marketed that way.
Tough-1 is an abomination. But an abomination has its uses if you get a good price and take up the plan of buying cheaper blankets more often. I have liked their quilted blankets far more than their turnouts. I think a turnout has a tough job because there’s nothing but the waterproofing to protect the horse. Somehow, the quilting in a blanket that holds air in that insulating layer helps the very wet blanket dry a bit from the inside.