The Glo Duo is a soy wax candle company started by twin sisters. Our candles are made from all-natural soy wax, which is grown here in the US and supports Midwest soybean farmers. If burned properly, they burn clean - practically no smoke. We make our candles in small batches to ensure quality control and making sure that we take pride in each candle that enters your home. All fragrance oils used are phthalate-free.