Remove the toughest stains Fels-Naptha is a powerful laundry bar that works overtime to remove greasy, oily stains, perspiration, and ring-around-the-collar. With over 100 years of removing America’s stains, you can rest assured that this laundry bar knows how to tackle your toughest stains. All you’ve got to do is rub the stain with a wet bar of Fels-Naptha and let it sit for a few minutes. Then wash your clothes as you normally would and say farewell to tough stains for good….