TOURMALINE PARTICLES, ADDED TO THE CERAMIC COATING OF THE STRAIGHTENING PLATES, GENERATE A FLOW OF NEGATIVE IONS DURING THE HEATING PROCESS WHICH REDUCES STATIC ELECTRICITY ON THE HAIR, LEAVING IT SILKY, SMOOTH AND SHINY. FURTHERMORE, THE HEAT SPREADS THROUGHOUT MODO UNIFORM SURFACE AND MAINTAINS HAIR INTEGRITY. RANGE FROM 130°C TO 230°C.