Up to 50% better heat transfer (metal barrel provides up to 50% better heat transfer when compared to Conair plastic round brushes). Hi-speed style. Combination of boar and nylon bristles distributes scalp's own oils to leave hair silky and shiny. Smooth and straighten, or curl and wave hair. Professional-quality results. Contains 10% copper coating. www.conair.com. Facebook. Twitter. Pinterest. Instagram. Made in China.