Seresto Flea and Tick Collar for Dogs and Cats is an easy-to-use， odorless collar that kills and repels fleas and ticks for 8 continuous months. It also aids in the treatment and control of sarcoptic mange and kills lice.

This easy to apply collar:

Is water-resistant and remains effective following a shampoo treatment， swimming or after exposure to rain or sunlight

Provides odorless， non-greasy and easy-to-use protection

Kills chewing lice

Kills and repels fleas before they lay eggs

This collar is available in three varieties: cat， small dogs (up to 18lbs)， and large dogs (over 18lbs).The active ingredients are stored within the collar. They are released in low concentrations and are distributed over your dog's hair and skin surface for 8 months. As active ingredients wear off over time， Seresto for dogs continuously replenishes the skin and coat with a new supply of active ingredients. Fleas and ticks are killed through contact with the active ingredients ; no biting required.