This WetBrush Volumizing Round Brush-Fine/Medium Hair offers more body and bounce with less pain, effort and breakage. Exclusive HeatFlex™ bristles bend and flex to effortlessly detangle and remove knots with less pain and breakage while you style. Ultra soft nylon bristles smooth the cuticle and enhance shine without pulling or snagging. Unique concave bristle design gets closer to the root and maximizes control for more body and volume. Vita-Boost (tm) infused barrel and bristles coats hair with biotin and keratin with every stroke to help strengthen and protect against damage. Ceramic barrel emits negative ions for shiny, frizz-free styles.