The boar bristles help to spread this sebum around to lubricate each of your hair strands which reduces frizz. For Smooth Finishing and Quick Drying. Nano ionic technology in the barrel and bristles helps reduce frizz and add shine. Cuticles are sealed, producing a smooth, soft texture from roots to ends. Blowout round brush creates loose curls and waves in medium to long hair and helps straighten and add volume to shorter and medium styles. The ceramic barrel heats up during blow-dryinghelping to lock in volume and curland the vents allow air to flow freely, decreasing dry time. Ceramic round brush features a lightweight, ergonomic design with a textured, one-piece handle to eliminate hair catching and pulling.