Oh, and cheap mohair is usually not real mohair, it's usually a rayon/cotton mix that's just called mohair or whatever. If it says 100% mohair, then i's real goat hair, and is great. The rayon can irritate senstive skinned horses, but dries much quicker, and is strong. Cotton isn't quite as durable, and has all the absorbing qualities, so it's cooler on the skin, but takes longer to dry out.
Personally, I LOVE my mohair cinches, but cheap they "ain't". Also, hardware is an important factor. Nickel or any "plated" hardware will chip quick, when exposed to normal wear and tear, and can not only irritate your horse's skin, but cut the strings on the cinch, shortening it's life, as well. So only get stainless steel or brass. It's more expensive, but well worth the money in terms of durability and comfort for your horse.