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Most clothing labels list fiber content. Almost none explain what that content means for your health. This is a practical guide to the fabrics that appear most in activewear and...

Recycled polyester is marketed as the sustainable activewear choice. On the microplastic shedding question, the research gives a clear answer that the marketing typically avoids.

Recycled polyester is marketed as the sustainable choice in activewear. The safety question is a different question from the sustainability one. Here is an honest answer to both.

Elastane is a synthetic fiber present in almost all activewear. Like other synthetic fibers, it sheds microplastic particles during washing. Here is what the research shows about the scale and...