Are polyester blend fabrics less harmful than 100% polyester?

Blending polyester with natural fibers like cotton does reduce some concerns but does not eliminate them. A 50/50 cotton-polyester blend will shed fewer microplastics than 100% polyester, but it still sheds significant amounts. The polyester component retains all its properties including non-biodegradability, potential chemical residues from manufacturing, and reduced breathability.

From a skin comfort perspective, blends can offer a compromise: the natural fiber component improves breathability and moisture absorption while the polyester adds durability and wrinkle resistance. However, any garment containing polyester will contribute to microplastic pollution when washed and will not fully biodegrade at end of life.

For the highest-contact items like underwear, sleepwear, baby clothes, and activewear, 100% natural fibers are strongly preferable. Blends may be acceptable for lower-contact items where durability is prioritized, but be aware that any synthetic content means microplastic shedding and potential chemical exposure. ONDU focuses on 100% natural or plant-based fiber garments because even small percentages of synthetic material compromise the health and environmental benefits.