Pocket Boar Bristle Hair Brush B4. 5 rings of extra stiff boar bristle tufts. Mason Pearson hairbrushes have been loved by generations, a British design icon that still outperforms its rivals. The famous orange pad fills with air through a small hole in the tip of the brush, giving the hairbrush a luxurious soft cushion. This classic hairbrush is designed to gently tease out tangles, while massaging the scalp and distributing natural oils through the hair.