Removes allergens as you go. Dead skin cells are captured with every brush stroke- so they get removed, not spread around your home. No buttons or dials Adjust bristle length and switch between groom, self-clean and self-store modes, with a single thumb control. Flexible bristles The 364 bristles are angled at 35°, and flex to an upright position as you brush. So they penetrate your dog's coat to grab loose hairs. For medium- and long-haired dogs Designed for adult dogs with longer hair.