Ecologic Fiber Reactive Dyes used, the best dyes, by far, for cotton and other cellulose fibers. 1. Soluble in water, NO petroleum based solvents 2. Much brighter and longer-lasting than all-purpose dyes. 3. Permanent dyes. They  mix with the molecules of the fabric and turn into part of it and have no tactility 4. Very good light fastness and color protection from degrading by ultra violet rays 5. Very good washing and rubbing fastness with brighter shades 6. Very good perspiration fastness