Trust Inno Sense Kimblewick Port Medium The Kimblewick cheekpiece is like a Pelham, but has a more direct effect and can be ridden with one or two reins. The lower the rein, the greater the leverage effect, and the more effective the bit will be. This cheekpiece is also used as a driving bit. The Inno Sense Port Medium is made of elastic plastic, harder than the Flexi Soft. The Inno Sense Port Medium is slightly flexible. This mouthpiece has a tongue arch which provides less pressure on the centre of the horse’s tongue. More tongue freedom is ideal for horses that have a sensitive tongue or horses that stick out their tongue.