Absorbine Ultrashield Gold Insecticide and Repellent from W.F. Young is field tested and proven effective at stopping flies, ticks, and mosquitoes before they bite. Absorbine Flyshield is an innovative ingredient blend which works by combining standard insecticide ingredients like pyrethrin and permethrin with next generation technology like organic fatty acids to interrupt a bug’s homing system, making it unable to locate and land on your horse. Ultrashield Gold kills and repels over 100 insects and delivers added benefits like coat conditioners, sunscreens, and a bright, pleasant aroma of leather and citronella. Long-lasting repellency protects in all weather conditions and stays active for 17 days. Contains 0.1% pyrethrin, 0.5% permethrin, and 1% piperonyl butoxide. Ready-to-use, water-based formula.