The Dynamic allows me to simply drop my leg down. My horse has a fairly round rib cage and is a big mover. He tends to move me around a lot in the saddle and before the Dynamic, I struggled a lot in the attempt to sit in my horse. The Dynamic has a narrow twist. It allows me to simply drop my leg without making it an active effort to do so. At the same time, the saddle has a deep comfortable seat that naturally engages my core. It gives me a very anchored and secure feel in the saddle which is really super given that my horse is a super expressive mover.