ghd Duet Style 2-in-1 Wet & Dry Hair Straightener – Like New For sale is my ghd Duet Style 2-in-1 Wet & Dry Hair Straightener, used only a handful of times and still in excellent, like-new condition. Comes with the original box and travel case (see pictures). Please note: the ghd hair oil mentioned on the box is not included in this listing. This styler is designed to be used on wet or dry hair, combining drying and straightening technology for a sleek, smooth finish with less heat damage.