The Winsor & Newton Designers Promarker is a professional-grade marker that is perfect for any artist or designer. This marker features a unique, alcohol-based ink that is both lightfast and permanent, making it ideal for a variety of applications. The Cloud Blue color is a light, airy blue that is perfect for adding a subtle hint of color to any project. The marker also features a chisel tip that allows for both fine and broad strokes, making it easy to create a variety of effects. The marker is also double-ended, with a fine tip on one end and a brush tip on the other, giving you even more versatility. The marker is also non-toxic and acid-free, making it safe for use on a variety of surfaces. With its lightfast ink and versatile tips, the Winsor & Newton Designers Promarker is the perfect choice for any artist or designer.