The Silentnight anti-allergy pillows are filled with anti-allergy hollowfibre that actively protect your pillows 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. The pillows are also machine washable at 40°C which means you can keep them fresh and clean for longer. Silentnight are the UK\'s most trusted sleep brand with over 75 years\' experience in creating products that offer solutions for every sleeper.