Advantage flea treatment for cats over 4kgs is applied to your cat's skin and gets to work quickly, killing existing fleas within one day and re-infesting fleas within an hour and for up to a month. It is a spot-on solution that is easy to apply and kills fleas on contact, so fleas don't have to bite to die. Simple to use, Advantage helps give you peace of mind in the fight against fleas. Its super ingredient stops fleas biting within 3 to 5 minutes and kills both adult fleas and larvae within 20 minutes. Applied once each month kills fleas on your cat fast and breaks the flea life cycle.