3M Ultrathon Insect Repellent Lotion, 2-Ounce (2-Tubes) UltrathonTM Insect Repellent was initially developed by 3M for the US Military to provide up to 12 hours of protection for their troops. It is still used today Advanced 3M formulation creates an effective barrier that repels mosquitoes that may carry West Nile Virus, and ticks that may carry Lyme Disease Time Release Protection means DEET is slower to evaporate and provides protection after others have dissipated - up to 12 hours of protection against mosquitoes. Splash & Sweat resistant to ensure consistent protection through all your outdoor activities. UltrathonTM has been tested in the harshest environments in the world