What is the difference between Sweet Iron, Inno Sense and leather?

What is the difference between Sweet Iron, Inno Sense and leather?
May 18, 2018 Karen Borgers

Sweet Iron: Sweet iron will rust when it comes into contact with (air) humidity; the surface rust tastes sweet and naturally stimulates the saliva production. This will cause the horse to salivate more which in turn encourages better acceptance of the bit. The rusting process (oxidation) changes the blue colour of the TRUST-bit to a brownish-grey.

Inno Sense: The Inno Sense bits come in three different models: soft, medium & hard. The mouthpieces are available in the versions; flexi, mullen and port. Bits from the Inno Sense line can be used for every horse and particularly suitable for young horses and/or horses with a sensitive mouth. The synthetic material is FDA approved, which means the material does not contain plasticizers and is non-toxic to people and animals. In addition, the flexi- and mullen model of the Inno Sense Bits line are solid because of the application of a core of stainless steel. Horses that are ridden with an Inno Sense Bit follow the hand easily and accept the bit smoothly.

Leather: The core of the bit is made of reinforced nylon. The leather that is stitched around this core, is naturally tanned without chemicals. The saliva production softens the leather bit and makes it more pleasant for the horse. The flexible mechanism in combination with the taste of the leather, makes the bit particularly suitable for horses with a sensitive mouth.