Polycolor pencils have a round body made from the best natural PEFC-certified cedar wood, with a coloured end the same colour as the pencil lead. They have a 4mm diameter lead for a better yield and are made from permanent high-pigment powders which are UV resistant.The colours are intense, bright, water-resistant and interpenetrate perfectly to create a limitless number of shades, blends and undertones.They lend themselves for use in any kind of illustration or drawing work.No fixative required.