Off ! Clip-On Refills, 2 Count Refill (Pack of 24), 48 Total Refills Each repellant provides up to 12 hours of head to toe protection. Odorless, No skin application necessary.. Use refill within 14 days of opening. Great for backyard, gardening, watching sports, at the beach, camping, at the park. Active ingredient 31.2% Metofluthrin.