3M Ultrathon Insect Repellent Lotion, 2-Ounce (3-Tubes) Time Release Protection means DEET is slower to evaporate and provides protection after others have dissipated - up to 12 hours of protection against mosquitoes. Advanced 3M formulation creates an effective barrier that repels mosquitoes and ticks 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 Splash & Sweat resistant to ensure consistent protection through all your outdoor activities. UltrathonTM has been tested in the harshest environments in the world