The Silentnight Luxury Anti Allergy Mattress Topper is filled with anti-allergy hollowfibre that actively protects your bed from bacteria and dust mites to help prevent allergies. These anti-allergy fibers are approved by the British Allergy Foundation, providing an ultimate seal of approval. The mattress topper is also fully machine washable, allowing you to keep your bed feeling fresh and clean for longer. This topper helps rejuvenate your mattress by adding another layer of cushioned comfort. It is scientifically tested and proven to reduce or remove allergens. Elasticated straps stretch comfortably over your mattress for a secure fit. This product comes with a 2 year manufacturer's guarantee.