Swat Is A Ready-To-Use Insecticide For Horses Containing The Pyrethroid Insecticide ˜Permethrin’ In A Non-Irritant Formulation With A High Residual Efficacy Against Buffalo Fly, Stable Fly And Sand-Flies.¢ Rain Resistant Formula “ For Long Lasting Effectiveness• Low Irritant “ No Alcohol Formula• Highly Concentrated250Ml Will Provide 2 Months Protection For 1 Horse (8 Applications)500Ml Will Provide 4 Months Protection For 1 Horse (16 Applications)Free Applicator Glove Included In Pack