This special edition of the X3 pen is treated with Biomaster, an Anti-Microbial agent that provides a second line of defence against harmful bacteria. It is IN the product, not ON the product which will give you permanent protection. This product has been tested in accordance with ISO 22196 for Anti-Microbial effectiveness. Biomaster does not affect the recyclability of the item. The product also includes Verimaster a unique tracer that is built into the material to prove that the item is treated with Biomaster. Including ca. 1200m writing length German Dokumental® blue ink refill with TC-ball for ultra smooth writing.