After measuring The Clean Dirt or The Problem Solver into a bowl, use the angled treatment brush to quickly and easily activate these fresh formulas into their mousse consistency. The angled brush head hugs their  barrel-bellied treatment bowl, eliminating mess and creating the most lush texture. On the skin, soft, substantial bristles glide along the hills and valleys of your face, neck, décolleté, armpits, and back, making application effortless