The Silentnight Anti-Allergy mattress topper brings an extra layer of soft, cushioned comfort for a deeper, fresher sleep. Filled with anti-allergy hollowfibre, it not only enhances the feel of your mattress but also 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. Elasticated straps stretch comfortably over your mattress for a secure fit, and it is also machine washable at 40°C, which means you can keep your mattress topper 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.