Passier Optimum Mono Dressage The Passier Optimim Mono Dressage saddle has been developed around the monoflap concept, which allows the rider to have greater contact with the horse and therefore greater influence.The knee pads are positioned at the top of the flap to optimize the legs position.The innovative “Lifter” system ensures that the saddle sits firmly on the horse, even for horses with most prominente withers.