Fiber Reactive Dyes are a type of dye that chemically bond with fibers, making them ideal for coloring natural materials like cotton and linen. These dyes are known for their vibrant colors and excellent wash fastness, meaning they resist fading even after multiple washes. These dyes work by forming a covalent bond with the fiber, which ensures that the color remains intact. Fiber Reactive Dyes are often used in textile arts, such as tie-dye and batik, and are popular among crafters for their ease of use and ability to produce bright, long-lasting results.