(2007) Tile-Top AM No. 420 – has the same timeless appeal and exceptional feel as original Tile-Top SpongeCote®, but is now 100% anti-microbial. The improved, permanently anti-microbial surface is able to destroy micro-organisms on contact and can result in a significant reduction of air-borne contaminants. This non-porous vinyl surface is also constructed with an extra wear layer for exceptional abrasion and chemical resistance. The mat's exceptional comfort comes from its micro-pure™ sponge base. This unique Nitrile rubber composite is specifically designed for exceptional resilience and long life, and also offers permanent anti-microbial properties.