this is what cajun candles says about cd wicks: "The Heinz Stabilo wicks are a German made all natural, coreless, non-directional, flat braided wicks with a special paper filament woven around them. They are formally known as CD wicks.This configuration is engineered to promote maximum and consistent capillary action while ensuring a self trimming wick that will hold the posture of the flame. The Stabilo series is used in many different applications and is especially compatible with the harder-to-melt viscous waxes of both paraffin, soy and vegetable base." I have to trim mine but not very much. and they do hold the posture.