T3 heat-resistant, Carbon, Ionic combs are a perfect companion for the high heat of T3 hair tools. Large Styling Comb. Use with high-heat T3 tools. Combing eliminates static electricity. Creates a sleek and shiny look. Smoothes the cuticle to prevent tangling. Tourmaline is a precious gemstone commonly found in jewelry and known as the 'electric stone' for its natural ability to emit ionic energy and infrared heat when heated or put under pressure. Forged from Tourmaline and Carbon, these combs are literally made of minerals and jewels.