Macadamia's groundbreaking new Tunnel vent Brush combines healthful benefits of 100% natural boar bristle with high-heat resistant nylon pins. Thanks to an infusion of negative ions this brush has both antibacterial and frizz-negating anti static properties and will leave your hair feeling more smooth, healthy and manageable. Use in conjunction with macadamia's oil treatment or spray oil to dramatically intensify these benefits even further.