Pure Protection Pillowcase is safe and powerful. The EPA registered silver used in these polyester fibers fights and prevents acne, repels mold, mildew, fungus, and odor-causing bacteria, keeping fabrics fresh and protected from first use to last. And thanks to this unique embedding technology, Beacon offers superior performance and durability with no special care or handling. This powerful antimicrobial protection doesn’t wear off, wash away, or weaken against viruses, mold, mildew, fungus, and odor-causing bacteria. It even withstands peroxide and chlorine bleach. If it says Beacon Bactericidal™, you can count on its performance.