The brush is a regular one with a tapered and an irregular design. This is a mascara that adds a lot of length with one coat. It's also nicely volumising, it very decent at definition because it has good hold, so the lashes stay in place once the mascara is on. It can even hold my stubborn lashes curled a bit, which I appreciate given that it's a regular, washable formula. However, that hold also means it's one of those mascaras that leaves the lashes quite stiff - if you dislike that, their Big Bad Lash formula is softer and has a very similar effect (that one is another of my big favourites along with Max Factor's 2000 Calorie).