Sawyer's formula features 20% Picaridin, an insecticide that delivers a similar effect as DEET without the harm to your camping and hunting gear. This long lasting topical insect repellent is effective up to eight hours against mosquitoes, ticks, biting flies, gnats, chiggers and fleas. Virtually odorless, Sawyer's mild citrus scent quickly evaporates away after application. 4 oz. bottle.