Most horse tack sits on horse skin. Some horse tack — bit guards, muzzle pads — touches horse mouths, lips and gums. For those products, 'industrial silicone' isn't good enough. You need the same purity class used in baby pacifiers and medical infusion tubing: zero leachable monomers, zero heavy metals, zero off-gassing chemicals. That's the class Rubbrex produces across our entire equestrian line, not just the mouth-contact SKUs.