Repels mosquitoes that may carry West Nile virus. From Skintastic. Off! FamilyCare Insect Repellent III is specially formulated with a lower level of active repellent ingredients and aloe vera to feel and smell better on your skin. Repels mosquitoes, biting flies, gnats, no-see-ums, and chiggers up to 2 hours from treated skin and clothing.