Stretchy performance jeans blending cotton, rayon, polyester, and spandex are comfortable and flexible, but they raise serious environmental and some health concerns. Polyester and spandex come from petroleum, don’t biodegrade, and shed microplastics during washing—up to 50,000 fibers per pair—which pollute oceans, lakes, and even remote areas like the Arctic. Rayon production relies on toxic chemicals that harm workers and ecosystems, while conventional cotton demands heavy water and pesticide use. These blends are tough to recycle, adding to fashion’s massive waste and emissions problem. For health, synthetics trap heat and moisture, potentially causing skin irritation, rashes, allergies, or odor buildup, especially in sensitive people, though major risks remain low for most. Overall, these jeans impact the environment far more than health, making 100% cotton options a greener choice to cut microplastics and chemicals.
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