Farnam Endure Sweat-Resistant Fly Spray for Horses

Won't sweat off! You can't seal your horse in a fly-free zone, so EndureSweat-Resistant Fly Spray for Horses is the next-best option. Its unique formula keeps on working - even in wet conditions such as sweat and rain. Protect your horse from biting and nuisance flies, gnats and deer ticks that may transmit Lyme disease.