The mattress Grand Memory has Viscoelastic, a latest generation material that is used in premium mattresses. It is a hyperconductive material and capable of eliminating large doses of heat flow, obtaining a rest without temperature accumulation. Sanitized anti-mite treatment, anti-allergic and antibacterial. It has TodoTherm Fiber gel that provides a Thermo Regulator effect. This mattress has a rest system created layer by layer independently to achieve a cloud effect while you sleep. Each Grand Memory mattress cover has been made and designed independently achieving maximum volume and minimizes night movements achieving a restful sleep. Top cover in stretch fabric with hypoallergenic and extra-soft fibers. This mattress has Duo-System technology that provides two independent firmnesses for each face: Medium firmness on side A and firmness on side B In this way, it is adapted to all needs, guaranteeing the maximum satisfaction of the user. High durability: guarantees that it will retain all its characteristics for 10 years of intensive use. The core and its excellent support provide a comfortable fit without sagging. Great ergonomics at rest, its composition will offer you a comfortable home. Top - Top technique sewn with high quality thread. Technical specifications: Thickness: +/- 21 Cm Viscoelastic + Supersoft Foam + Biotherm: 4,5 cm Anti StressSytem Pro® Firmness DuoSystem H2-H3: Side A medium firmness B side high firmness Good adaptability and ergonomic High degree of comfort High density HR Pro core Independence of the beds 100% antibacterial SANITIZED Sewing Top - Top technique Breathable Anti-humidity Stretch fabric High durability: up to 10 years with intensive use Quality system OEKO-TEX® Europe certificate 100% satisfaction guaranteed 3 years warranty Made in Spain The product will arrive coiled under vacuum and it is necessary to let it rest on a smooth surface for 24 hours before use. To preserve the optimal conditions of the product, it must be unpacked before three weeks after receipt, otherwise the company is not responsible for the loss of quality of it.