These tie - dyed green headbands are super easy to use. Just wrap them around your head and adjust them to fit comfortably. You can wear them for workouts, parties, or just for a casual look. When it comes to maintenance, hand - wash them in cold water with mild detergent and let them air dry. Remember, due to the warning about lead and cadmium, don't let children chew on the headbands. Keep them away from food and drinks to avoid any potential chemical exposure.