The Gentle Scalp Care Hair Brush carefully combines boar bristles and nylon synthetic fibers to restore your hair's vitality and shine. The keratin-rich boar bristles provide natural hydration to the hair fiber, while the nylon fibers ensure a gentle brushing experience, strengthening your hair in the process.The rounded tips and perfectly calibrated firmness of the synthetic fibers in this brush, combining boar bristles and nylon, ensure a deep yet gentle scalp massage.