Natrapel 8 hr DEET free insect repellent. Provides up to 8 hours of protection against biting insects and ticks. Picaradin formula recommended by the CDC: Features: Natrapel Plus deet free is a great alternative to deet repellents. Protection for the entire family against mosquitoes, black flies, no-see-ums and other biting insects. 12 individually wrapped wipes.