The Mason Pearson Hairbrush cleans the hair and stimulates the scalp, increasing blood flow to the roots. Boar bristle is used because it has a natural affinity to human hair. That is to say, the structure of Boar bristle is similar to human hair. The affinity makes the boar bristle cling to the hair shaft, to accomplish the purposes of hair brushing. Rubber cushion: dry natural rubber Handle and base: our lightwood-backed hairbrushes are entirely hand-crafted from plane, apple and beech trees originating from london squares. Please note, this is a natural product and colors and patterns may vary from the image. Bristles: 100 % extra stiff pure boar bristle. As a natural product, boar bristles may vary between hairbrushes, but we take every step to ensure the quality and consistency of our brushes. 9 inches Made in United Kingdom