RECTANGLE SKELETON BRUSH. The natural boar bristles and heatflex heatresistant bristles gently detangle while blow drying. Glides through tangles minimizing pain, split ends and breakage. Wrk well to evenly distribute your hairs natural oils and dry shampoo. Open vented design allows moisture to be removed from the hair faster, speeding drying time. The Omniflex brush head flexes in every direction to contour to scalp.