Enviro Equine Fly Spray Plus Horse First Aid puts all-natural ingredients to work to protect your horse from pesky pests. This spray is both safe and effective, thanks to its unique blend of essential oils and pH-balanced solution. It provides long-lasting protection against insects without using silicone, pyrethrin’s, or permethrin. It’s safe to use on all of your horses and pets and is effective up to eight hours. The formula is gentle and won’t cause scurf with frequent use. It even acts as a coat polish and skin conditioner to keep your horse comfy, happy and looking fabulous.