High-quality liquid chalk markers. Once dry, they do not smudge or fade. They are dirt-resistant and withstand light rain. User-friendly: shake briefly, press the tip until it is colored, write, and let it dry for a few minutes. Easily removable with a damp cloth, allowing for quick re-writing. Writes on all non-porous surfaces such as chalkboards, glass, metal, plastic, and more. Safe for health. Suitable for hotels, restaurants, and the hospitality industry.