Stink free is guaranteed to remove all odors caused by sweat in your shoes boots and gear stink free contains no perfumes to mask the odor stink free products are scientifically formulated to kill the bacteria that cause smelly shoes and lead to smelly feet stink free works by spraying a chemically safe liquid into your shoes let your shoes dry and the smell will be gone you and your friends amp family will be able to breathe a little bit easier when your shoes are in the room