These smaller sizes of Sawyer Picaridin Insect Repellent are airline approved, so they're perfect when you're on the go. Picaridind has a similar effect to DEET, yet it won't harm gear or equipment.. At 20%, this long lasting topical insect repellent is effective up to 8 hours against mosquitoes, ticks, biting flies, gnats, chiggers and fleas; and 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. The 0.5 spray tube is lightweight and compact, perfect for the tackle box, backpack, purse, or your pocket. Airline approved sizes.