Unlike industry-standard petroleum-based dyes, this shirt is dyed with marigold petals, oak galls, and logwood.
Marigolds, of the tagetes species used on this shirt, have been traditionally used topically for their astringent and antibiotic properties. Studies have found that marigolds are high in antioxidants and other enzymes good for the skin, and are currently researching its use as an anti-wrinkle cream.
Oak has natural antiseptic and anti-inflammatory properties that help reduce skin irritation.
Logwood dye is extracted from the heartwood of logwood trees. It has been safely used in Europe since the 1500s, and by the Mayans for hundreds of years before that.