Cotton-polyester blends wash at 30–40 °C on a gentle cycle. Polyester can hold odours and suffers from high heat, which makes fabric crease and pill. Do not go above 40 °C unless the label allows it. Avoid fabric softener, which coats polyester fibre and reduces absorbency. Dry at low heat and take items out of the machine promptly. Exact behaviour depends on the blend ratio. In the machine, do not overload it, so that friction between garments stays low and the fabric keeps its surface.
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