Sawyer’s Premium Ultra 30 Deet Repellent Lotion is a Liposome-based totally repellent that is the latest advancement in insect repellent technology. Very similar to the in advance generation of polymer-based totally controlled release systems (like 3M? Ultrathon), the Liposome envelops the DEET and slowly time-releases it as needed, thereby extending the effectiveness of the repellent. Unlike polymers, on the other hand, liposomes are a natural compound which is more comfortable to the surface and more straightforward to wear. The Liposome base enables the 30% DEET lotion to be non-greasy, with little to no odor. Ultra 30? may be non-staining, resists perspiration, and is effective for as much as 11 hours. Airline approved size.