The Nordic Flex mattress has a layer of viscosoft that helps to regulate the thermal flow and increases the feeling of rest and comfort. This mattress has a rest system created layer by layer independently to achieve a Cloud effect while you sleep. Therefore, it grants a great adaptability and without sinking. In addition, it has an optimal firmness and a breathable and thermo sensitive core. Its top cover is made of Stretch fabric with high weigth and extra-soft padding. It contains Biotherm fibres that reduce the electrostatic charge of the body which is produced by accumulated friction. This helps to reach and lengthen the REM sleep phase, thus achieving an excellent rest. This mattress has Duo-System technology which provides two independent strengths for each face: Medium firmness on face A and firmness on face B In this way it is suitable for any need guaranteeing maximum user satisfaction. High durability: guarantees that it will maintain all its characteristics during 10 years of intensive use. Technical specifications: Thickness: +/- 21 cmViscosoft: 2cm Fiber Biotherm: 400 gr DuoSystem H2-H3 Anti Stress System Pro® AirSense System: Comfortable and Adaptable Sanitized system against fungi, mites and bacteria Adjustable thermos Non deformable Weight independence High durability OEKO-TEX® European certification 3year guarantee Made in Spain The product will arrive rolled in vacuum and it is necessary to let it rest on a smooth surface for 24 hours before use. To preserve the optimum conditions of the product, it must be unpacked before three weeks after its reception, otherwise the company is not responsible for the loss of quality of it.