This fly spray contains 0.20% Permethrin & 1.6% Piperonyl Butoxide to kill & repel horse, house, horn, stable, face & deer flies, deer ticks (that may carry Lyme disease), mosquitoes, gnats, & lice on horses. Apply this repellent as a wipe every 5-7 days, then every 10-14 days as needed. Also contains sunscreen for added protection.