Sawyer’s Ultra 30 insect repellent is the newest advancement in insect repellent technology. Because it is liposome-based, it is comfortable on the skin and is slowly time-released as needed, extending the effectiveness of the repellent for up to 11 hours. Sawyer’s Ultra 30 insect repellent is non-greasy, odorless, non-staining, and sweat-proof, and is compatible with sunscreens and effective against mosquitoes, ticks, flies, chiggers, fleas, and no-see-ums.