My horse couldn't stand neoprene at all. I always used fleece ones. Got Reinsman (sold it this year after quitting Western) and loved it: it was nice and kept its shape (unlike those cheapy ones). The good part about the fleece IMHO: it soaks in the sweat. The bad part - neoprene probably slides less.
"Life isn't about waiting for the storm to pass: it's about learning to dance in the rain..."
"When we are no longer able to change a situation - we are challenged to change ourselves."
"How people treat you is their karma; how you react is yours."