Straightening of dry and wet hair thanks to una Air straightening technology | Dries and styles your hair in one step. The Airstrait HT01 Onyx Black/Gold hair straightener uses a direct airflow that straightens damp hair without using extreme temperatures and dries it at the same time. tempo. The result? Smooth, shiny, and naturally healthy hair that maintains its vitality without losing its shine. You'll save tempo while also protecting your hair from heat damage, which means less breakage and more care.