Inno Sense Pelham Port Medium - The Inno Sense Medium Post mouthpiece is made from elastic plastic, but is harder than the Flexi Soft. It is a little bit bendable. The mouthpiece has a tongue port which reduces the pressure on the middle of the horses tongue. Inno Sense Bits The Inno Sense Flexi Soft mouthpieces are made from elastic plastic material, which is really flexible. Inside is a flexible metal core. The flexibility makes it an overall very friendly bit which is accepted really well by most horses. The Inno Sense Flexi Soft is not as suitable for very strong horses. How it works: These bits act on three different points on the horse's head: via the tongue on the lower jaw, through the leverage of the cheek pieces on the neck and via the curb chain on the lower jaw. The rein aid is distributed over the various pressure points on the horse's head. This enables the rider to have better influence and control, e.g. with strong or stormy horses. Correct basic training and rideability should be a prerequisite for using such bits. Since the horse's lower jaw is very sensitive and only covered with a thin layer of skin, a curb chain pad should always be used as a cushion.