Flea & tick squeeze-on for cats and kittens over 2.2 lbs. and under 5 lbs. Formulated with a revolutionary new adulticide called Etofenprox. Etofenprox, when applied monthly, kills adult fleas, ticks & repels mosquitoes including the mosquito that carries West Nile virus for up to one month. Also includes nylar, an insect growth regulator that kills flea egg and larvae for up to three months per application.