Sensitive Military Shape Hair Brush SB2M. Ideal for mens hair and very short hair, including crops and pixie cuts, this military-style hairbrush has all the benefits of a classic Mason Pearson without the handle, giving you full control of each and every stroke. The Mason Pearson Military Sensitive uses specially-selected fine boar bristles to gently massage the scalp and stimulate natural oil production for healthier-looking, shiny hair. Oten used for very fine or thinning hair, people who are losing their hair for medical reasons, including alopecia and chemotherapy, sensitive scalps.