Seresto Benefits No need to remember monthly applications Non-greasy, odorless, easy to use Active ingredients imidacloprid and flumethrin provide dual action against ticks and fleas Bayer's Polymer Matrix is designed to slowly and continuously release the active ingredients for 8 months Kills fleas and ticks REPELS ticks on dogs. If a tick is repelled or killed, it cannot attach to a dog. If a tick doesn't attach, it can't transmit organisms that may cause diseases. Available in two sizes: Small dog or large dog For use on dogs and puppies 7 weeks and older Seresto Benefits An effective, reliable alternative to monthly flea and tick topicals With its sustained release technology, Seresto delivers the performance you expect from a topical treatment in an easy-to-use collar for 8 months of uninterrupted protection against fleas and ticks. Seresto for Small Dogs is a unique flea and tick collar that provides up to 8 months of protection. Made of a novel blend of materials, it releases its active ingredients in small doses giving your dog a safe and controlled barrier. The Seresto collar not only kills existing fleas and ticks but repels ticks before they bite. This helps protect your pet from diseases spread by these parasites. Seresto can be worn along with your dog's normal collage and can be adjusted to fit any dog.