Fekkai Large Round Brush
“The natural boar bristles are easier on color-treated hair than synthetic ones,” says Hazan. “And they won’t melt when heat styling.” She uses it with her Elchim 2001 Hair Dryer ($105, 800-875-7511 for salons), which dries by using high air pressure instead of excessive heat. “It has a lifetime guarantee.”
To buy: $65, fekkai.com.