As the original flea and tick collar, Seresto has delivered reliable, long-lasting** protection for years, earning its place as a leader* in flea and tick control. Formulated with flumethrin and imidacloprid, the Seresto collar kills and repels fleas and ticks, and it kills chewing lice on dogs for a full 8 months. What's more, this tick and flea treatment for dogs is effective against fleas that may transmit tapeworm infections, as well as ticks that may transmit Lyme disease, anaplasmosis, Rocky Mountain spotted fever, and more. How it works: The collar's polymer matrix uses extended-release technology to gradually distribute the active ingredients across your dog's skin and coat for 8 months. That's season-to-season flea and tick prevention for dogs you can rely on. Best of all, this tick and flea dog collar works through contact***, so fleas and ticks don't have to bite your dog to die. Recognized as the #1 vet-recommended flea and tick collar, Seresto delivers proven 8-month efficacy against fleas and ticks backed by years of real-world use. Designed for dogs and puppies 7 weeks of age and older, the adjustable Seresto dog collar comes in two sizes: for dogs under 18 lbs. and dogs over 18 lbs. It's also odorless, non-greasy, and water-resistant. Seresto is water-resistant and remains effective following a shampoo treatment, swimming or after exposure to rain. Under normal conditions, effectiveness lasts for 8 months. In order to maintain an eight-month duration, dogs must not be bathed more than once per month. For dogs that swim once a month or more, the control duration is reduced to 5 months for flea control and reduced to 7 months for tick control.

Looking for more information on flea and tick control? Check out our flea and tick control buying guide in the product documents section.