For use on clothing, tents, and other gear, Sawyer Permethrin not only repels insects, it actually kill ticks, mosquitoes, chiggers, mites, and more than 55 other kinds of insects on contact. The active ingredient Permethrin is a synthetic molecule similar to pyrethrum which is taken from the Chrysanthemum flower. Permethrin is odorless after drying and will not stain or damage clothing, fabrics, plastics, finished surfaces, or any of your outdoor gear. A single application lasts 6 washings or 42 days of sun exposure. Note: Avoid contact with skin, eyes and hair during application phase. FeaturesLasts up to 6 weeksOdorlessEffective against disease carrying ticksCreates a barrier for your entire campsite