The Staedtler triplus colour fibre-tip pen has an ergonomic triangular shape for relaxed and easy writing and colouring. The fibre-tip pen is dry safe which means it can be left uncapped for days without drying up. The water based-ink washes out easily of most textiles. The fibre-tip pen has a linewidth of approximately 1 mm. It comes in a stand-up Staedtler box which makes it ideal for school and office use.