Seresto Flea & Tick Collar for Small Dogs and Puppies up to 8 kg, Single Pack, Longest-lasting Protection, Odourless, Adjustable and Water-Resistant Dog Collar, 1 Pack. Seresto offers the longest-lasting flea & tick protection for dogs. It is an easy to use, odourless, water resistant dog collar that protects dogs from fleas and ticks for 8 months. Seresto harnesses innovative technology, allowing for the controlled release of low doses of the active ingredients into the dog's coat. It works fast and on contact, so there's no need for fleas and ticks to bite to die! Seresto kills adult fleas on your dog, larval flea stages in their surroundings, and controls flea allergy dermatitis. It also controls brown dog and bush ticks and reduces the transmission of tick-borne diseases, including deadly ehrlichiosis, for 4 months. Seresto prevents flea tapeworm infection and treats lice. Safe to use on puppies from 7 weeks of age and any weight.