1 0Z. Pump - Natrapel 8 hour provides 8 hours of DEET-free protection from mosquitoes, black flies, ticks and more for up to 8 hours at a time. Specially formulated with 20% Picaridin, an ingredient recommended by the CDC to repel ticks and insects carrying illnesses such as Eastern Equine Encephalitis (EEE), West Nile Virus (WNV), malaria, Lyme and other infectious diseases.