Tec Labs® The 10 Hour™ Insect Repellent is 100% DEET formula that helps protect you from mosquitoes, ticks, fleas, no-see-ums, chiggers, horse flies, and biting flies for up to 10 full hr. Repels insects that are known for carrying diseases such as West Nile Virus, Encephalitis, and Lyme Disease. Because you only need a few sprays, the 2 oz. atomizer spray typically lasts as long time. There is no scent added and it is formulated not to sweat off.