When talking about biodegradable* PET fibers, we often got the question: 'How do PrimaLoft® Bio™ fibers work? PrimaLoft® Bio™ fibers break down at a highly-accelerated rate in landfills, wastewater, and oceans. This is because they have been optimized to be more attractive to the naturally-occurring microbes found in these environments. These microbes eat away at the fibers at a faster rate, returning them to their natural elements. Don't hesitate to contact us to find out more on biodegradable PET fibers.