Here's what i do for my show horses. . . . .
Each horse has a fleece lined throat latch sweat and fleece neck wrap. The throat sweat has a neoprene outer shell, an the neck wrap has neoprene at the end, the neoprene helps them sweat more but the fleece lining protects the skin from burning. They get the throat sweat on and the neck wrap over that. We keep it very snug, just enough room to squeeze a couple fingers in between, but its a tight squeeze. Some people think it's choking them, but just think how tight a cribbing collar is and many horses wear those and can breathe just fine. Plus if it is too loose, it totally defeats the purpose and the wrap can slip or move causing more problems. We start wrapping them every night at the beginning of February...ish . . . . Once the start their exercise routine (as soon as the snow/ise has cleared enough, they get worked in neoprene sweats a couple times a week. Someone suggested lining the neoprene sweat with bubble wrap, which keeps heat in and keeps the actual sweat clean. I plan on trying it this year, since the bubble wrap can just be thrown away when I am done, instead of having to wash the sweat every day.