This Pronto crimped nylon bristle brushes an hour glass shaped barrel. This barrel catches all the hair in the middle of the brush, making it easier to control during the style. The barrel is a ceramic aerated structure, so it will heat up when used with a blow dryer. This will make blow drying and styling easier for the professional or at-home stylist. Pronto brushes are a very popular hour glass shaped, ceramic barrel rounders. WARNING: Ceramic barrels get very hot when used with a hair dryer or other warm styling tool. Do not touch your face, scalp or hand with a hot barrel as it can easily burn you or the person whose hair you are working on.