The cushion-based nylon bristles glide easily through the hair. The bristles are strong enough to brush through knots, yet flexible enough to be gentle on the scalp. Regular brushing creates strength, suppleness, seals the hair cuticle and produces healthy shine and beautiful hair. Because of the flexible bristles, this hairbrush is ideal for hair with hair extensions. The Detangling Spa Brush glides easily through the hair without damaging the bonds.The black rubber cushion has eight rings of nylon bristles that move easily through the hair. In addition it has a comfortable grip because of its curved, matt coated handle.