Sensation Harmony element, one size fits all. Seat size can be adjusted up or down to suit the rider. Also comes with the twist bolsters to create the feeling of a twist in the seat. Stirrup hangers can be adjusted forwards or backwards to suit the rider. Comes with Skito pad with the dryback material on top. Does an awesome job of keeping the horse's back cool. I bought the saddle second hand but the person that I bought it from barely used it. Comes with leathers and a cover.