Inno Sense Medium Port Inno Sense Medium Port bits are made of an elastic plastic and are slightly harder than the Inno Sense flexi soft bits. Inno Sense Medium Port bits are slightly flexible and have a tongue port. The plastic of the Inno Sense bits is FDA approved, the material is non-toxic and contains no plasticizers. Loose Ring: A loose ring snaffle is a basic bit with loose movable bit rings and is therefore quite loose in the mouth. Depending on the type, thickness and material, a loose ring snaffle gets a sharper or softer effect. It is important that the loose ring is not too narrow, otherwise a skin from the corners of the mouth can get in between. If your horse does have problems with this, you can use rubber bit rings if necessary. A loose ring snaffle is a good basic bit, suitable for many horses and riders. Straight mouthpiece features: A straight mouthpiece consists of 1 piece and gives pressure on the tongue, layers and lips. The shape and thickness of the mouthpiece determine where the pressure will be in the mouth. A straight mouthpiece with a tongue port gives more pressure on the layers and keeps the tongue free. The straighter and thicker the mouthpiece, the more pressure on the tongue.