The Hershesons Tourmaline Professional Curling Tong have a ceramic tourmaline barrel which contains negative ions to seal the cuticle, lock in moisture, and keep your style in place for longer.Designed for professionals, the Tongs include a simple digital temperature readout, which is adjustable between 130 - 230 degrees, for gentle yet effective results.For peace of mind, the Tongs include a heat resistant mat and will automatically switch off after 60 minutes. The included travel bag is great for storage or packing in your luggage.