These candles are hand-made entirely from sustainably produced plant waxes, naturally sourced soya and rapeseed oil wax blend. They contain no animal products, nor do they contain petroleum-based paraffin wax. The oils are pressed and distilled without the use of solvent extraction (with paraffin candles, petroleum chemicals like hexane are used). They burn with a brilliant clear flame, without black smoke. 100% pure essential oils are infused to give beautifully scented candles. Plant wax candles burn at a higher temperature than paraffin wax candles, so they burn for longer. Burning times are approximately 50 hours for the 3" candle, 100 hours for the 6" candle and 40 hours for the glass pot candle.