Do the Duvet Covers contain harmful chemicals? 31 May 2023 06:42 Our Sheets and Duvet Covers are free from harmful chemicals and dyes and are tested to ensure they are safe. Related articles The fitting seems very tight, have I bought the right size? How do I wash my Le Linen sheets? Do the sheets contain harmful chemicals? Is the Great Barrier Mattress Protector waterproof? Can I wash the duvet in my washing machine?