Soy wax is made from hydrogenated oil derived from soybeans, making it a natural wax that is less expensive than beeswax or bayberry waxes.
This is a type of candle that is unique to them, perhaps it has been created using a specific scent, blend of candle waxes or a special shape.
They provide specific information about waxes, wicks and molds that they sell and this can be a very reliable way to learn more about different types of materials.
Although paraffin waxes are amongst the cheapest and most popular waxes used for candle making, if you're looking to make the very best scented candles available soy wax will likely be your first choice.