I have a mohair Weaver SmartCinch, and I love it! It breathes wonderfully, I can ride for ages and my horse barely sweats up under it. The SmartCinch buckle just plain makes life easier, ha ha. The thing is that it's tricky to keep clean and hair free, but that's kind of the nature of a mohair cinch. I like the neoprene cinches, they really stay put, but in my experience the horses really sweat up under them.
A stubborn horse walks behind you, an impatient one in front of you, but a noble companion walks beside you ~ Unknown