Tell pesky pests to buzz off from your mane mare with help from Equus Magnificus Essential Equine Go'Way Natural Horse Insect Repellant Roll-On. The roll-on balm helps repel the insects that can pester and wound your horse. Itâs safe for both horse and rider, and it doesnât stain your mareâs hair, mane, tail or your clothes. The carefully selected blend of essential oilsâincluding fragrant cedar, peppermint and citronellaâprovides a pleasant scent that doesnât repel you, too!