5-in-1 Protection: One simple-to-apply, monthly application protects your cat from fleas, ear mites, heartworm disease, roundworms, and hookworms. Easy-to-Apply: Applying Revolution doesn't require gloves or separation time. It's quick-drying, pre-measured, and applied topically on the back of your cat’s neck. Wash your hands after use. Break the Flea Life Cycle: Effectively treats and controls flea infestations by killing adult fleas and preventing flea eggs from hatching. Year-Round Protection: Whether they're indoor loungers or outdoor explorers, Revolution keeps all cats protected from harmful parasites, because sneaky pests can find their way inside too. Confidence in Every Application: Approved for cats 8+ weeks old, Revolution has been trusted by veterinarians for over 20 years and is FDA-approved to protect your pet inside and out, from harmful parasites.