These steamers are available in various colors and styles and are easy to carry. This particular variety of facial steaming machine has three basic functional options , aromatherapy, herbal and ozone. The ozone-steaming machine makes use of internal ultra violet light and the boiling process in order to produce steam. The ozone variety of steam is also capable of increasing cell oxygenation. However, the steam when combines with natural aroma and herbal therapy excellently treats your skin blemishes leaving your skin soft and glowing. For normal skin facial, ozone steamers should be applied for six to eight minutes, for oily skin it should be applied for eight to twelve minutes, for dry skin the application of the steamer should be for five to seven minutes and for sensitive skin the steamer should not be used for more than three to five minutes.