Biosafe Anti Microbial Keyboard Cover for Logitech K520 Keyboard, Keeps Out Dirt Dust Liquids and Contaminants - Keyboard Not Included - Part# 546G114 The Keyboad is not Included. Viziflex seels has now incorporated Biosafe anti-microbial coating. The Biosafe polymer resin helps provide protection against microbes and bacteria on the surface The Biosafe coating inhibits the microbes ability to reproduce and spread. The coated (Biosafe) Seel will provide the same flexibility, clarity and strength as our standard Testing was done by Anti Microbial Test Laboratories, Please see the related picture above.