Only used once, wasn’t right for my hair texture. Bristles have since been cleaned. Retailing for $74 on their site. From their website: “The Brush No. 001 is made by hand. Then, thanks to its combination of boar and nylon bristles and an ergonomic, protective cushion, it ends with a healthier head of hair: the shorter boar bristles work to distribute natural healthy oils throughout your strands, preventing them from becoming dry and brittle and protecting your scalp from oxidative damage. The longer nylon bristles gently stimulate your scalp to increase blood flow. Follicles stay healthy, volume is added at your crown and hair grows longer, faster. We recommend the Brush No. 001 for medium to thick, straight or wavy hair.” The Brush No. 001: 8.75in x 2.5in x 1.5in