Sawyer Picaridin Insect Repellent has a similar effect to DEET, yet is safer on gear and equipment. At 20%, this long lasting topical insect repellent is effective up to 8 hours against mosquitoes, ticks, biting flies, gnats, chiggers and fleas. Picaridin is more effective at repelling biting flies than DEET. Our 20% Picaridin is virtually odorless; it has a mild citrus scent added to it which quickly evaporates when dry. And it will not harm gear or equipment.