Finally, an antimicrobial that can stand up to real life: work, play, every day. Keeping America warm, and fresh, Indera Mills has teamed up with SILVADUR antimicrobial to create warm, thermal underwear products with lasting odor control built in. Treated with SILVADUR technology to minimize odor, Indera Mills thermals keep you ready for any situation. SILVADUR lasts for more than 25 washings, so it stays in place and keeps working for the life of the product.