All of our candles are made with 100% pure essential oils and soy wax -- NO artificial fragrance oils. Each candle contains the maximum amount of oil that the wax will hold to ensure a potent, "real deal" aromatherapy candle. We have found that soy is very consistent, with a smooth and creamy appearance, a great scent throw, and an even burn. Our candles are made with wicks constructed from natural flat cotton threads interwoven with paper threads. They produce a consistent flame and slight curl that works well with the natural soy wax and ensures an even burn. Our wicks are lead and zinc free.