IKEA FJÄLLBRÄCKA down/feather duvet: six washing and drying steps
For Korean-market FJÄLLBRÄCKA 404.585.20, check its duck-down/feather fill, machine-wash limit of 60°C, reduced detergent and thorough tumble drying.
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IKEA Korea lists FJÄLLBRÄCKA warm duvet (150×200 cm, item 404.585.20) with a 100% cotton shell and 60% duck down/40% duck feathers. Its care limits are model-specific; always follow the label of your actual duvet.