This is the discription from the label:
Eco-Friendly Dyes
'L' means low-impact dyes that react with the fiber in such a way that they are almost entirely absorbed into the fiber. "N" meansnatural dyes. These are grown in our Midwest, Southeast Asia, and atin America often in place of more harmful crops. By creating a market for these dyestuffs many people are able to improve the quality of their lives where they live. Dyestuff used include cochineal, madder root, and osage.
