Endure Fly Spray Repellet is a sweat- and water-resistant fly spray for horses and ponies providing repellency, quick knock-down and long-lasting protection against horse, house, stable, face, horn, and deer flies, gnats, mosquitoes, lice, ticks and deer ticks that may transmit Lyme Disease. Endure features sunscreen and RepeLockTM conditioner for skin and coat (binds to hair shaft - won't sweat off!). It contains 0.15% cypermethrin, 0.2% pyrethrins and 1.60% piperonyl butoxide. Use Endure fly spray after brushing, shampooing and drying. Apply it as a spray or wipe. Repeat after 5-7 days for initial application; ss protection builds, reapply every 10-14 days.