WoodWick candles are well-known for their natural hardwood wicks, which, when burnt, generate the sound of a crackling fire as they burn. Yes, the candles are made of soy wax, which burns cleaner and produces less soot than paraffin or paraffin waxes. To ensure even dispersion of wax, burn these WoodWick candles long enough to melt the whole top layer of wax on the first pass.