I wear a short bob on a beautiful thick hair. On dry hair brush that gives only a small additional volume through the claw. However the big wet hair pin round brush is great: it dries hair illico and the volume is downright too, so I rebrosse a little over not look like a crazy :) I never was drying them before the hairdryer (too long) but in winter it will be very significant (outside the concept of brushing) I removed one star because I wish it to be as effective on dry hair and also for the too loud and shrill sound for my taste, forced to wear Kies balls while I cover.