Effective long-lasting fly control that won't sweat off! Contains Cypermethrin as an active ingredient. Provides repellency, quick knock-down, and long lasting protection from flies, gnats, lice and mosquitoes. A unique formulation that contains RepeLock®, a conditioner that binds to the hair and remains active in wet conditions and when the horse sweats. Contains a sunscreen to protect the horse from ultra-violet rays, Provides up to 14 days of fly control.