With a revolutionary ceramic lead, that is strong, smooth to draw with and stays sharp for longer, Sewline's Mechanical Fabric Pencils have become an incredibly popular marking tool.
The colour is actually baked into the ceramic which means that you get a smooth action when drawing, there are no particles to get trapped in the fibres and the colour remains constant throughout.
Thanks to its construction, the lead will not break as easily as standard propelling pencils.
Different lead colours for clear fabric marking are available here