Add a protective layer to your mattress with this anti-allergy topper that fights off dust mites and bacteria so you can sleep peacefully. It's filled with specially treated fibres and approved by Allergy UK, which means it's been tested for its protective qualities. The topper is 3cm deep and fits double beds perfectly, with elasticated corner straps that secure it to mattresses up to 30cm thick. You'll find it stays neatly in place throughout the night without shifting around. The elasticated straps make fitting quick and straightforward, gripping your mattress securely so you don't need to adjust it constantly. It's machine washable and tumble dryer safe, which means keeping it fresh is simple and convenient. The topper arrives vac-sealed for easy transport, and it regains its full depth and shape within 24 hours of unwrapping. Whether you're looking to protect your mattress or create a more comfortable sleep environment, this topper delivers practical benefits you can rely on. Suitable for double beds. Size L190, W135, D3cm. Cover made from polyester. 100% Polypropylene reverse. Polyester filling. Fitted. Secured by elasticated corner straps. Anti-allergy. Anti-allergy. Cover is machine washable and suitable for tumble drying. Contains a biocide to help protect against bacteria and dust mite allergens. Active substance: Dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride.