The Seresto 2-pack 8-month flea and tick collar for small dogs provide continuous 8-month flea and tick protection each. Unlike oral flea and tick prevention products that require fleas and ticks to bite your pet to work, the Seresto flea and tick collar for small dogs kill fleas and ticks through contact—no biting required. Seresto flea and tick prevention are also available for cats. Seresto flea and tick collar for dogs is water resistant and remains effective after swimming, shampooing, or exposure to rain or sunlight. (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 five months for flea control, and reduced to seven months for tick control.) Seresto 2-pack small dog flea collar contains two active ingredients: Imidacloprid to control flea infestations and flumethrin to repel and kill ticks. These active ingredients are slowly and continuously released in low concentrations, spreading from head to toe, even the tail, over your dog’s coat and skin. Seresto 8-month flea and tick collars for small dogs can be used alongside other identification collars. Avoid the hassle of messy monthly treatments and get the effective protection of Seresto flea and tick collars.