1 OZ. Pump - Natrapel® 8-Hour provides 8 hours of DEET-free protection from mosquitoes, black flies, ticks and more. 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.