The Arkwright 12-Piece Silversure Antimicrobial Cleaning Cloths extensive testing proves Silversure treated microfiber cloths with SILVADUR (TM) antimicrobial technology. SILVADUR (TM) uses silver ions proven to be highly effective in protecting against odor-causing microorganisms. Our antimicrobial treated microfiber cloths inhibit the growth of harmful microbes that could otherwise propagate within the microfiber cloth's fibers. Our antimicrobial treated microfiber cleaning cloth is approved as non-toxic by Oeko-Tex international standards and is certified to be 99.9% effective in destroying microbes after 50 washes. We use only the best microfiber that is designed to lift dust, dirt, grease, oils, silicone, grime, smudges, and haze. Use the cleaning cloths for high traffic areas like light switches, bathrooms, and doorknobs. Microfiber is the perfect eyeglass cleaner, shop towel, and glass cleaning cloth. Keep car cleaning supplies in your glove box. Use as a kitchen towel, washcloth, or gym towel. Machine-wash in warm water. Do not use fabric softener or bleach. Antimicrobial treated microfiber cloths are highly sensitive to dry heat. For best results, air dry. Tumble dry on low.