Regardless of the girth/cinch I use, I have found that most horses get sweaty in that area really easily when worked. However, I think that lots of people dislike neoprene girths because they don't dissipate heat very well. I personally use one on my western saddle with no problem, but there are folks that either love or hate them.
I thoroughly dislike neoprene girths. They are slick when wet, pull hair when dry, hold the heat in, and they will gall the crap out of a sensitive horse.
I'm not a huge fan of felt cinches either as I've seen too many sores from where the felt bunched up and created a pressure point.
Personally, I only use mohair or alpaca (generally mohair because it's a little cheaper) string cinches. So long as they are adjusted and sized correctly, I've never had one gall a horse. They wick away moisture and dissipate heat well.
I think the type of girth used depends on use, I mostly trail ride, in low scrub/brush, long grasses, bush and sometimes water. My choices might be different if I mostly used groomed surfaces and wide/clear or arid trails
I use perforated neoprene, yes the horse sweats under them but I don't find the good ones stick when dry or slide when wet. Cheap skinny or badly shaped can cause issues, but that goes for any girth too.
I find any string, felt or fleece just gets full of burs, seeds and twigs. My mare also gets itchy from the (I believe) salt build up in absorbent girths if it's not carefully washed after every use.
I find leather girths to be much the same as neoprene only require more care
Pinching, rubbing and galls are related to bad design, incorrect position, poor quality or too tight/loose IMO
See what others are using who do the same type and amount of riding as you and then it's just trial and error.
My wife loves her airflex cinch. I like the felt ones. I tried the string/rope type once and only once because it seemed to pinch the horses skin and hair between the ropes. The neoprene seems to stick to the horse more and pull their hair out.
We've tried the neoprene saddle pads and each horse we tried them on would buck but not if we put a felt pad under it. I think it was a waste of money buying those pads. If those saddle pads can cause enough discomfort to cause a horse to buck, why wouldn't a cinch of the same material cause discomfort?
On a side note, I've never had an issue of a horse getting itchy or get sore spots from not washing a felt cinch. I've never washed mine. I make sure there is no foreign objects besides horse hair on them. Sweat hasn't been an issue. Posted via Mobile Device
Mohair, Mohair, Mohair! I want to pose a simple question to you. In the heat and dust would you rather wear a sweater or a wetsuit? I realize I am prejudiced as I am a custom mohair cinch maker. But the fact is natural fibers are always better. If you want a quality cinch I am happy to make you one. Go to www.dfwhorsetraining.com and place your order.