It’s no secret that too many of the plastic products we use end up in the ocean. But you might not be aware of one major source of that pollution: our clothes. Polyester, nylon, acrylic, and other synthetic fibers — all of which are forms of plastic — are now about 60 percent of the material that makes up our clothes worldwide. Synthetic plastic fibers are cheap and extremely versatile, providing for stretch and breathability in athleisure, and warmth and sturdiness in winter clothes. These fibers contribute to ocean plastic pollution in a subtle but pervasive way: The fabrics they make — along with synthetic-natural blends — leach into the environment just by being washed. Estimates vary, but it’s possible that a single load of laundry could release hundreds of thousands of fibers from our clothes into the water supply. Read more at Vox.