designer's own words:Always maintain cleanliness by removing hair attached to a hair brush easily and cleanly. People usually remove the dust and hair tangled to a hair brush with hands, but it isn't removed cleanly. The hair can be easily shaken off by making a brush of the hair brush move up and down. Additionally, it solved a sanitary problem of the existing hair brush. If we use this CLEAN BRUSH, we can improve existing usabillity and problems and solve it. This Clean Brush has a structure that a brush can be popped-up down and up, and can be moved. If we comb our hair, the hair and impurities would much attached in the brush. At this time, while a brush of the comb rising high and tightly moves in the opposite direction, the impurities remains at the upper part of the brush and this are shaken off easily. Also, the brush handle part is made to be turned in a screw form.