And polyester textiles are never pure polyester. The most common mix of materials you’ll find in old clothing is 70 percent polyester, 30 percent cotton.

Polyester is the refined sugar of our wardrobes: It’s cheap, has an iffy reputation and is in almost everything, from stretchy leggings to $4,000 jackets. An estimated 34 million tons of it went ...

Unifi pioneered this eco-friendly fabric, but today it is far from the only recycled polyester maker. According to Textile Exchange, an industry group that has been pushing the fashion industry to ...