Seresto® is an odorless, non-greasy collar that kills and repels fleas and ticks on cats for 8 continuous months. Its patented technology gives your client the performance they expect without having to remember monthly administrations. Seresto® is water resistant and remains effective following a shampoo treatment, swimming or after exposure to rain or sunlight. Under normal conditions, effectiveness lasts for 8 months. In order to maintain an 8-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.