A collar like no other, Seresto flea and tick collar provides long-lasting protection against fleas and ticks for eight months. The active ingredients in Seresto flea and tick control collar spread throughout your pet's skin and coat and are able to kill parasites through contact, meaning parasites do not have to bite your pet in order to be killed. The collar works by releasing active ingredients from its unique collar matrix in controlled, low doses giving long-lasting for eight months. Odourless, water-resistant and easy-to-apply, the Seresto flea and tick control collar is an easy way to protect your dog or cat.