The Silentnight anti-allergy duvet is filled with anti-allergy hollowfibre that actively protects your duvet from bacteria and dust mites to help prevent allergies. Our anti-allergy fibres are approved by the British Allergy Foundation, which means they have the ultimate seal of approval. It is also machine washable at 40°C which means you can keep your duvet fresh and clean for longer. Silentnight are the UK's most trusted sleep brand with over 75 years' experience in creating products to help the whole family get that great sleep feeling.