The brush has a fine flexible rubber bristles that make applying this mascara a walk in the park. The heart of the brush, in my speak that would be the base where the bristles sprout from is thicker than I prefer, so that was one of the reasons I was not so keen on the mascara at the beginning, but I have grown to appreciate the brush, its clump free formula as well as the fact that my lashes are being conditioned while made to look longer. After getting used to using this mascara I can honestly say I will buy it again, but I will be using my Foschini discount vouchers.