Greasy hair meets its match with this heavy-duty dry shampoo. IGK First Class Charcoal Detox Dry Shampoo cleanses and refreshes even the most oily strands with an oil-absorbing, odor-eliminating formula. Detoxifying charcoal powder lifts away dirt and buildup while absorbing oil, odor, and sweat. Calming white tea calms the scalp and strengthens hair follicles.