AMK Ben's Clothing and Gear Repellent 0.5% Permethrin formula binds to the fibers in your clothing and gear. Kills ticks and insects on contact with treated gear and clothing. Easy to apply&#8212;spray directly on clothing and gear and let dry. Lasts up to two weeks. One bottle contains enough repellent to treat two complete outfits. Due to federal shipping restrictions regarding products with hazardous or flammable materials, this product can only be shipped via ground transportation. We&#x92;re sorry, but Next Day Air, 2nd Day Air, USPS Priority or Express shipping are not available for this item.