Three-barrel curling irons, also known as triple barrel wavers, represent a unique and innovative approach to hair curling. Unlike traditional curling irons that utilize a single barrel, these specialty tools feature three adjacent barrels to create distinctive, deep waves in your hair. They function by crimping large sections of hair between the barrels, producing an effect that resembles the natural waves of beachy, sea-tossed hair. The resulting style has lots of body and  a certain depth that's hard to achieve with traditional curling tools.