This fly collar is built from a vinyl body with a cork insert that holds natural repellent oils close to the horse's neck without contacting the skin directly. The formula draws on plant-based ingredients such as geraniol, citronella and cedar oil to help repel flies, gnats and mosquitoes around the head and neck. The collar closes with a snap fastener that includes a safety break-away feature, allowing it to release if caught on an object. It is designed to be worn alone or alongside a halter or bridle and fits horses turned out, stalled or in a corral. The collar should be removed before bathing until the horse is completely dry, and returned to its resealable packaging and stored in a cool, dry place when not in use. Fit is adjusted so two to three fingers can pass between the collar and the neck for comfort.