The Winsor & Newton Designers Promarker Brush - Saddle Brown is an essential tool for any artist or illustrator. This marker is made with a unique brush nib that allows for precise and accurate lines, making it perfect for detailed work. The ink is water-based and non-toxic, making it safe for use by all ages. The ink is also lightfast, meaning it won't fade over time. The marker is double-ended, with a brush nib on one end and a fine nib on the other, giving you the flexibility to create a variety of effects. The marker is also refillable, so you can keep using it for years to come. To use the marker, simply press the nib onto the paper and move it in the desired direction. The marker is ideal for sketching, illustrating, and coloring. With its versatile design and quality ink, the Winsor & Newton Designers Promarker Brush - Saddle Brown is a must-have for any artist or illustrator.