Your pets are family and PetArmor plus helps you confidently care for your cat especially when it comes to flea and tick control. PetArmor plus conveniently provides quality protection without the expense of a vet visit. PetArmor plus flea and tick topical for cats 8 weeks and older who are 1.5 pounds or larger is a waterproof fast-acting long-lasting formula that kills adult fleas and ticks plus stops the flea cycle dead in its tracks.