The Seresto cat collar is a type of flea and tick collar designed for cats. It contains an active ingredient called imidacloprid and flumethrin, which are released slowly over several months to kill fleas and ticks and prevent their re-infestation.
The collar is designed to be worn around the cat's neck continuously for up to eight months, providing long-lasting protection against fleas and ticks. It is also water-resistant and can be worn while the cat is bathing or swimming.
However, it's important to note that not all cats may tolerate the collar, and some may experience side effects such as itching, redness, or hair loss. It's always best to consult with your veterinarian before using any flea and tick products on your cat to determine if it is safe and appropriate for your cat's individual needs.