This .75 ounce (21 grams) bag of Indigo dye by Jacquard is a synthetic organic that is pre-reduced 60% for ease of use. Used for thousands of years throughout cultures around the world Indigo is the only source of blue in the entire plant kingdom. It has unique properties that make is exceptionally well at creating resist patterns on fabric. You can produce a wide range of blues with Indigo from pale sky blue to the darkest navy making the results variable. Made in the USA.