1. Protect your dog from fleas and ticks for eight months with Seresto Large Dog flea and tick collar, recommended by veterinarians and trusted by pet owners for almost a decade. 2. Seresto Large Dog collars kill and repel fleas, ticks, and chewing lice, and aid in the treatment and control of Sarcoptic mange. 3. The collar is odorless, non-greasy, and water-resistant, making it effective even after swimming, exposure to rain or sunlight, bathing, and shampoo treatment. 4. Seresto Large Dog collars prioritize your dog's comfort by killing insects on contact, preventing further flea infestation, and eliminating tick infestations within 48 hours of the initial application. 5. The collar is suitable for dogs at least 7 weeks old, and no prescription is needed. Check the product label for information on potential side effects.