These 100% organic cotton baby onesies were dyed by hand using yellow onion skins with alum mordant. Earth friendly, nontoxic, and gentle on baby’s skin. The dyeing process is a multi-day process and done by hand to achieve beautiful, earthy hues. The soft, muted colors are perfect for little ones. The natural dyeing process produces variation in color, therefore each onesie will be unique. There may be small dye imperfections, darker and lighter spots, which adds to the organic look of the piece. Yellow onion skins with alum mordant produce lighter orange tones to burnt orange tones.