The RRD Wick is a directional, round wick constructed from a 100% braided cotton core, giving the wick a slight curl during combustion. Its ability to provide a concentric burn pool makes it especially useful in pillars and container candles. Apart from pillars and containers, the RRD Wick works well with viscous fuels such as vegetable wax. This wick is engineered to help minimize or eliminate mushrooming and smoke.