Yes. We use AZO-free, heavy-metal-free reactive and vat dyes certified to Oeko-Tex Standard 100 requirements, plus traditional plant dyes (indigo, madder root, walnut husk, turmeric) for our natural-dye ranges. AZO dyes — banned in the EU since 2003 for textile use — break down into carcinogenic aromatic amines and are never used in our workshops. If you need documentation for customs or for your own compliance audits, we can provide dye-house certificates with bulk orders.