Ben's Insect Repellent Lotion contains the maximum amount of DEET (chemical name, N,N-diethyl-meta-toluamide) for use in areas of high bug density with intense biting activity. It is also suitable for use when other insect repellents just won't cut it, Ben's 100% DEET provides up to 10 hours of protection from ticks and insects that may carry the Zika Virus, West Nile Virus, Lyme disease, and other infectious diseases. DEET disrupts a mosquito's ability to detect carbon dioxide and other products of human metabolism, which is how they find us. Long-lasting 0.5% CDC recommended formula bonds to the fibers in fabric for bug bite protection that lasts up to six weeks through several wash cycles.