Tough-PAC® Tablet are hard shell enclosures for iPad right up to the iPad 9.7" 6th generation the 10.2" 7th & 8th generations & 10.5" Air 3 models. Biomaster silver ion technology is incorporated during case 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 certified to the international ISO22196 anti-microbial standard that offers all round 360 degree 'ion-clad' protection working silently 24/7.