Defy the Fly Leg Bands Natural alternative with no chemicals or sprays that provides a line of defense for your horse repelling flies, mosquitoes and gnats, pesky insects that normally swarm around the horse's head and legs. Leg bands fit securely on the cannon bone above the fetlock. Features: Package of 4 Last up to 2 months. Item Specifications: Size: Fit 8 1/2"-10" fetlocks Ingredients: Citronella, Geraniol, Cedar Oil, Cork, Glycerin, Lanolin