"This mattress combines the premium quality bonnell spring system with the newer foams technologies to ensure comfort and support. It has 2cm polyurethane layers of foam on both sides of its springs, providing a medium-hard firmness level, which is easy to clean as it is encased within a zippered cover. FEATURES AND SPECIFICATION Dimensions: W90cm x L200cm x ~D15cm Hardness: Medium Firm Bonnell coil sprung mattress 2 sided mattress - 2cm polyurethane foam on both sides Washable cover with zipper The zip cover might slightly differ from the photo. SOLID DESIGN Encased in a cover, the mattress comes equipped with a durable bonnell spring system that uses fibre fillings to provide superb comfort. The coil spring unit is topped with durable polyurethane foam on both sides."