Get natural protection from pests with the TevraPet Naturals Flea & Tick Collar for Dogs. This collar helps repel fleas, ticks and mosquitos so your pup can enjoy more carefree outdoor adventures. The hypoallergenic formula provides gentle yet effective protection that’s safe for sensitive skin. Each collar features a secure, adjustable buckle that fits neck sizes up to 23 inches, and provides long-lasting relief for up to four months.