Staedtler Fineliner Triplus "Happy", 10 pens with a super fine, metal-clad tip and a line width of approximately 0.3 mm. The ergonomic triangular barrel ensures relaxed writing, and the plastic barrel guarantees a long lifespan. With water-based ink that can be easily washed out of most fabrics. Dry Safe – the pens can be left uncapped for days without drying out (except for neon colors). Perfect for colorful labeling, drawing, and sketching art projects, images, greeting cards, and other paper designs.