The 10-Hour Insect Repellent con¬tains a 100% DEET formulation and provides more than 10 hours of continuous protection – with just one application. This hard to find professional insect repellent has been used by outdoor workers for over 30 years. The 10-Hour Insect Repellent is manufactured by Tec Labs, the makers of Tecnu Poison Oak and Ivy products. Tec Labs is known for rock solid quality and for being an exceptional place to work. Tec Labs was chosen by The Scientist magazine as the best place to work in Industry for four years in a row. The 10-Hour Insect Repellent’s no scent added formula is also designed to not sweat off the skin. One 2-ounce, non-aerosol spray lasts as long as three typical aerosol cans of repellent. One big advantage of an insect repellent that lasts for 10 or more hours is that a person doesn’t have to stop what he or she is doing to reapply repellent. One application lasts a person all day long.