My favorite thing about these is that they’re water-based. I am a professional artist and I have been using the Posca for years. Water-based paint is ACMI-certified non-toxic.Suitable for over 50 surfaces, including wood, glass, metal, plastic, ceramic, leather and more.I was able to create bolder strokes with these more than other markers in my collection! Highly recommend them! I’ve used these markers for various projects over the years- coloring, drawing, art- and they have always worked well. The markers have a thin marker tip and their body is silver with a rubber grip for comfort and control. The color selection is really nice, it has some pastel colors but also some more vibrant ones as well. Plus, these markers come in a variety of vibrant colors that are sure to get your creative juices flowing! They’re made to be permanent markers and they come in 18 different colors. The low-odor ink marks on almost any surface from glass and metal to photos and foils so are perfect for a variety of decorative projects and have practical uses around the home, office/workplace too. The BIC Intensity Colored Markers are great for a variety of projects. Suitable For Adults, Kids, Women & Men.