This quality keeps it from cracking when it is carved. It is also better for dipped candles. The softer wax helps the layers adhere to each other better. The wick is a conduct that supplies the flame with a steady stream of wax. The best wicks to use are made with tightly woven cotton fibers.
Wicks come in rolls or pre-cut lengths.
Although they are made of cotton most will be treated with substances that allow the wick to burn along with the wax. Be sure to choose the right wick for the candle you are making. The width of the candle determines the thickness of the wick. If your wick is too thin for the candle it will not supply enough wax to the flame and your candle will not stay lit. If the wick is too thick it will flood the flame with melted wax.