Widu Brush Small Oval Brush. WHY WIDU? All natural bristles for healthy, shiny hair: Massages the scalp, adds luster, minimizes tangling, conditions as you brush and stimulates hair growth. Feels wonderful! WIDU is designed with rounded bristles to minimize hair breakage and massage your scalp as you brush, which improves circulation. This naturally hypoallergenic brush will not irritate even the most sensitive skin or damage long, thick hair. Bristles are replaceable-there are several extras in the package. The open hole is for pneumatic action! Widu combs and brushes are handmade.