Microscopic fibers shed from synthetic fibers in the washing machine wash down the drain and into aquatic ecosystems. The fibers end up in oceans, are ingested by fish and can eventually make their way back into our food supply. To "green" your clothing choices and laundry, look for clothing with natural materials like organic cotton, linen, hemp and sisal. If you can, avoid synthetics like polyester, rayon, spandex and nylon. But for your clothing like fleece pullovers, consider washing them by hand, which is less likely to shed fibers.