Pebeo Setaskrib+ Opaque Bold Tip Fabric Marking Pens, 4mm, Dark Blue Setaskrib+ opaque are very practical felt tip markers for decorating on most prewashed fabrics Their 4 mm round tips can be used to decorate clothing, accessories, home furnishings, etc. The barrel allows for an easy grip and ease of application The opaque ink allows for use on both light and dark fabrics