Drybar Full Pint Medium Round Ceramic Brush creates loose curls and waves in medium to long hair while helping straighten and add volume to shorter and medium styles. It features a lightweight, ergonomic design with a streamlined, one-piece handle to eliminate hair catching and pulling. The ceramic barrel heats up during blow-drying to lock in volume and curl, and the vents allow air to flow freely, decreasing dry time. NanoIonic™ technology in the barrel and bristles helps reduce frizz and add shine. How to use: For loose curls and waves, use vertically throughout the hair. For volume at the roots, use horizontally at the crown. For straightening, use horizontally throughout the hair. By Drybar.