CDC recommended formula of 20% Picaridin is the recommended concentration to guard against diseases transmitted by insects including the Zika Virus, West Nile Virus, Eastern Equine Encephalitis, Lyme Disease, and Dengue Fever. Easy to apply and easy on the air with the Eco-Spray can that delivers even, continuous spray without releasing harmful aerosols. Enjoy 12+ hours of insect protection. Safe on your gear as the DEET free formula won't melt jackets, fishing line, and other plastics. Earned Consumer and Outdoor Groups recommendations.