The Silentnight Anti-Allergy mattress protector helps to extend the life of your mattress by adding a soft, protective layer that guards against everyday wear, spills, and stains. Filled with anti-allergy hollowfibre, it actively protects against 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 mattress protector fresh and clean for longer. This product contains a biocidal ingredient with anti-bacterial properties that protects against fungal growth. The active ingredient is Dimethyloctadecy (3-(trimethoxysilyl)propyl) ammonium chloride.Silentnight are the UK’s most trusted sleep brand with over 75 years’ experience in creating products that offer solutions for every sleeper.