The Mother Brush by Happy Hair Brush Its all one piece, hair will not get caught in the join, bristles and brush pins are LONGER than the Original Happy Hair Brush so it gets right to your scalp and massages. Its actually light weight, so your arms won't feel like you've been working out to brush your hair. You can use on wet hair or dry hair and this brush handle allows you to take it into the shower as well. Why was the Mother Brush developed? They liked the Happy Hair Brush Original but found it didn't detangle their hair fully and get right to their scalp and only brushed the 'surface' of their hair. Hair Extensions, Thinning hair, Post baby hair, menopausal, chemo hair and all grey hair. Hair changes its thickness, volume and flexibility depending on they stage of life you're going through. Hence the Mother of all Brushes is here to be your hair BFF.