Sawyer Premium Insect Repellent 20% Picaridin - 3 oz spray Picaridin is a promising new insecticide; its effect is similar to DEET, yet it is safer on gear and equipment than DEET. 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 away. WILL NOT HARM GEAR OR EQUIPMENT!