The popularity of clothing containing polyester has skyrocketed. We like the “stretchiness” and easy care of synthetic fabrics. However washing clothes releases 500,000 tons of microfibers into the ocean each year – the equivalent of 50 billion plastic bottles, according to the World Economic Forum. Many of those fibers are polyester, a plastic found in an estimated 60% of garments. Producing polyester from fossil fuels releases 2-3 times more carbon emissions than cotton and polyester does not break down in the ocean. It is estimated that 35% of all microplastics (very small pieces of plastic that never biodegrade) in the ocean came from the laundering of synthetic textiles like polyester.
Some manufacturers have been using recycled plastic in clothing and footwear which, although better than using virgin polyester, still requires much more energy than hemp, wool or cotton, according to a 2010 report from the Stockholm Environment Institute.