The Winsor & Newton Designers Promarker Brush - Sky Blue is a high-quality marker that is perfect for creating vibrant artwork. This marker features a brush tip that is ideal for creating both fine and broad strokes, allowing for a wide range of artistic expression. The ink is water-based and non-toxic, making it safe for use by both adults and children. The ink is also lightfast, meaning that it will not fade over time. The marker is double-ended, with a brush tip on one end and a fine tip on the other, allowing for a variety of line widths. The marker is also refillable, so you can easily replace the ink when it runs out. To use the marker, simply press the tip onto the paper and move it in the desired direction. The marker is perfect for creating illustrations, sketches, and other artwork. With its vibrant colors and versatile brush tip, the Winsor & Newton Designers Promarker Brush - Sky Blue is an excellent choice for any artist.