Tough-PAC® Tablet is a hard shell enclosure for iPad right up to (2018) 6th generation. Biomaster® silver ion technology is incorporated during manufacture. This inhibits growth or destroys contaminating bacteria and fungi by more than 99.6% for the life of the product. It's not a coating, it's permanent. The only medical grade iPad case tested and certiifed to the international ISO22196 anti-microbial standard.