3M Ultrathon Insect Repellent Lotion 2-Ounce - 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