Contains Etofenprox 30%, (s)-Methoprene 3.6%, Piperonyl BUtoxide (butylcarbityl) (6-propylpiperonyl) ether and related compounds 5.0%. Starts killing fleas and ticks within 15 minutes. Kills fleas, ticks, flea eggs and flea larvae.  Kills and repels mosquitoes.

Available in 5 sizes for dogs - Toy, Small, Medium, Large and X-Large.