Cryogen-X™ - AgION® Blades Oster® is the first blade manufacturer to incorporate AgION®, antimicrobial into the surface of the Cryogen-X™ blades. AfION antimicrobial uses silver, a powerful metal ion, as the active ingredient to effectively control the growth of bacteria, mold and mildew – important protection needed when clipping animals next to each other. If AgION antimicrobial is on it, millions of bacteria aren't.