Enjoy lasting freshness with the SilvaSleep Antibacterial Sheet Set. It features Silvadur(TM) antimicrobial fabric protection, a patented technology that releases silver ions on fabric surfaces to block undesirable microbes and bacteria. The antimicrobial gets delivered only when needed, which means Silvadur won't immediately degrade like other antimicrobials. Controls the bacteria that can cause odors, decay and discoloration of your bedding. This treatment lasts for 25 washes before it slowly dissipates. Box fit design keeps fitted sheet in place on premium mattresses up to 18". King set includes king-size pillowcases.