The Sawyer Premium Insect Repellent contains 20% Picaridin, a promising new insecticide. The effectiveness of Picaridin is similar to DEET, but it won’t harm gear and equipment. The 20% Picaridin is a long lasting topical insect repellent that is effective up to 8 hours against mosquitoes, ticks, gnats, chiggers and fleas. It is also more effective at repelling biting flies than DEET. Sawyer"s 20% Picaridin is virtually odorless; it has a mild citrus scent additive that quickly evaporates after applying.