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. The formulation and applicator mitt enables complete coverage of your horse for maximum protection. Features of Swat: * Rain resistant formula for long lasting effectiveness * Low irritant no alcohol formula applications) * Highly concentrated. 250mL will provide 2 months protection for 1 horse (8 applications). 500mL will provide 4 months protection for 1 horse (16 applications). Swat is the most concentrated Permethrin product in Australia for horses to ensure MAXIMUM RESIDUAL ACTIVITY.