100% pure Tea Tree Oil. Tea tree oil is an essential oil and one of nature's little miracles: it is naturally anti-fungal, anti-septic, anti-viral and anti-inflammatory, and therefore has a multitude of uses. You could, for example, add a couple of drops of this Essential Oil to a cotton pad and swipe it over your face to help treat acne; or use it as a soothing decongestant for coughs and colds by adding a few drops to a bowl of warm water, draping a towel over your head, leaning over the bowl and gently inhaling.