The Scent-A-Way 07914 Bio-Strike Odor Shield Laundry Additive is a quick and simple way to convert your regular hunting and exercise clothing into scent-free garments for up to 30 days. For best results use with Scent-A-Way Bio-Strike Laundry Detergent. This proprietary formula penetrates clothing to eliminate existing odors and inhibit the development of new odors. Perfect for those long trips where rewashing isn't likely. Simple add a single packet during rinse cycle and dry clothes as you normally would. Safe to use in all washing machine types. Bio-Strike Odor Shield Laundry Additive has a limited lifetime warranty. Serious hunters prepare with Scent-A-Way!