Hair Straightening BrushThis hair straightening brush provides smooth, silky, natural and shiny hair while reducing breakage, split ends and hair damage while promoting hair health. The heating surface also has an ionic layer that keeps hair shiny and healthy. The straightener's PTC (Positive Temperature Coefficient) heating technology heats up to 350F within 20 seconds. This saves time on the way to work, when meeting friends or when going out for a drink in the evening.