A felt-tip is a type of pen that uses a porous tip made of felt or similar material to apply ink to paper. The ink is usually water-based or alcohol-based, allowing for smooth writing and vibrant colors. Felt-tip pens are popular for drawing, coloring, and writing due to their versatility and ease of use. These pens come in various sizes and shapes, making them suitable for different tasks. They are often used in art and craft projects, as well as for labeling and note-taking. Many people enjoy using felt-tip pens for their ability to create bold lines and intricate designs.