Repel Tick Defense Aerosol Repels ticks and mosquitoes for up to 10 hours. Light feel, strong protection. Can be applied to clothing, will not damage cotton, wooll, nylon, acetate or spandex. Repels deer ticks that may carry Lyme disease. Formulated with picaridin. Repels mosquitoes that may transmit Chikungunya virus, Zika virus, Dengue virus and West Nile virus.