Mason pearson pocket sensitive sb4 cleans the hair while stimulating the scalp and increasing blood flow to the roots sebum which is a natural conditioning oil comes from a gland at the base of every hair follicle and brushing will help to spread it along the length of the hair in order to give it strength and suppleness while providing a healthy sheen it is most suited for fine to normal hair it is comprised of 5 rings of tufts of carefully selected pure boar bristles which are set in a p