Even so, there were two pieces of tack that I used that had to be from natural fibers: my saddle pad and girth. For years, I found that mohair or fleece girths were the only things that wouldn't rub my horses raw, and natural wool pads kept my horses' backs cooler and pain free.
Although it could have been a terrible idea, I actually used it for the first time at the Christian Schacht Clinic. If the girth was going to cause any trouble, it would have been under those conditions. But nope. Six rides later and Izzy is as comfortable in the Airform as he was in the fleece.
While Izzy might not care that his girth is no longer hard and crunchy, I like that it's clean and pliable. I swear; is there anything that I haven't replaced for this horse? Wait. Don't answer that; I don't need any ideas!