a central core that determines flexibility: here, Flex + allows you to stimulate the same mechanoreceptors as a double-break cannon.
the body for ergonomics: under the pressure exerted by the rider's hands, the muzzle adapts to the particularities of your horse's mouth.
the covering layer for cushioning: the information transmitted from the rider's hands to the horse's mouth is partially absorbed. This is an intermediate cushioning layer between Soft (high cushioning) and Strong (low cushioning).
