What I really like about the Boz saddle is that it fits my 3 half-arabians (each one has a different shaped back) and then I can put in on my husband's half Percheron mare and ride her with it and it fits her too. The flexible fit conforms to each horse's back and allows freedom of shoulder movement. None of our horses have had any problems with back soreness at all with the Boz Saddle. Once you tighten the cinch on this saddle, it stays put! No shifting or sliding back and forth. I have used this saddle for both endurance and trail riding and this is a real plus when you ride in steep, hilly terrain. It's great to have one saddle that you can use on several different horses!