The bristle is made of a polyester weave where all the tiny, tiny bristles are pointed in the same tilted direction. Thus, when moving the brush against the bristles, the bristle will lift and catch the lint, hair, dandruff, shallow dirt etc. After a while there will be remains of lint etc. on the bristle and then it’s time to twist the handle 2–3 times to clean the brush. The remains end up in the container inside the brush handle and can easily be emptied by a light push on the lid on top of the brush.