This organic collection is free from harmful heavy metals, such as chrome and other dangerous chemicals. BED | STU uses vegetable tanned leathers prepared in a pre-industrial old world environmentally friendly way using tree bark, leaves, plants, and other organic elements.They use natural organic components in their finished products - vegetable tanned leather, natural latex rubber, biodegradable supports, and water based glues and dyes with limited exceptions, such as poly cotton threads for durability.In many of their styles they use a natural cork and recycled leather shavings in the mid-sole which will form to the shape of your feet for a long lasting custom fit.The true beauty of their product is found in the natural imperfections.