Under normal conditions, The Seresto collar remains effectiveness lasts for eight months. To maintain an 8-month duration, your pet must not be bathed more than once per month. The Seresto Collar works on contact, both killing and repelling fleas and ticks. The collar is water-resistant, meaning it's still effective after swimming, shampooing, and exposure to rain or sun.
Seresto Flea and Tick Control Collar Provide long-lasting protection against flea, tick, and lice infestations for up to 8 months. Works by releasing its active ingredients from its unique collar matrix in controlled, low doses giving long-lasting protection. Works by killing and repelling parasites before they bite and feed, therefore, eliminating the risk of disease. Seresto collar is Easy-to-apply, odourless, and water-resistant.