Faber Castell Polychromos artists' colour pencils have particularly soft waterproof oil-based leads. Their smoothness and resistance to smudging makes them a pleasure to use. Polychromos leads are not brittle, and can be sharpened to a very fine point; this allows you to draw filigree detail as well as cover extended areas completely with colour.
The excellent covering power of Polychromos colour pencils means that they can be used on a wide variety of materials such as paper, card, wood, or even fabrics.