Did you know that 95% of the candles made worldwide are made with paraffin wax? Paraffin wax is a derivative of petroleum, which creates highly toxic benzene and toluene when burned (both are known carcinogens).
In fact, the toxins released from paraffin candles are similar to those found in diesel fuel. This represents a risk to health and the environment, due to the harmful gases and vapors emitted in the manufacture of paraffin candles and when using them.
Soy candles, meanwhile, are 100% natural and organic. They are derived from plants, being biodegradable, which makes them a sustainable product. Soy candles can delicately perfume the environment even without lighting them, if they are scented with fragrances infused with essential oils.
The texture of soy candles is creamy, which helps give it a very smooth finish. When the wax melts it turns into a vegetable oil and is safe for the skin as well.
P.S. Don't fall for the words "soy blend" since "blend" is usually code for paraffin, which is cheap, durable, and easily mixes with scent and color—making for great, but potentially hazardous, candle bait.
source: https://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=P1009BZL.txt