Endure Fly Spray stays active and keeps working even in wet conditions. It provides up to 14 days fly control due to the special conditioner that binds to the hair shaft and won't sweat off. This spray protects against biting and nuisance flies, gnats and repels and kills deer ticks that may transmit Lyme Disease. It also provides repellency and quick knockdown of mosquitoes. | Farnam Endure Sweat Resistant Fly Spray Refill | Size 64 oz