Pvc. bristle brush ss ingrown hairs and razor bumps (scientifically known as pseudo folliculitis barbae) in their Tracks! Ingrown hairs occur when a hair curls over and re-enter the skin.. The springy polymer bristles of this brush massage the skin to release the tips of these hairs. chemical- ingrown hair and razor bump treatment, It also makes an excellent exfoliator! Gently massage problem areas and anywhere else to reveal soft, radiant skin. fits so perfectly in the palm of your hand that you may think it was custom made just for you. Simple and comfortable to hold No matter where you Need ingrown hair relief, even if your hands are lathered with shaving cream or oil. No matter your skin Type, flexible brush fibbers provide a perfect solution for preventing pesky, painful bumps. Most ingrown hair treatment options are too harsh for sensitive skin, particularly for delicate areas where ingrown hairs and razor bumps tend to form