Negative Ion Aerobic FabricOur mattresses feature Negative Ion Aerobic Fabric, helping to keep mattress surface at the ideal sleeping temperature. Comfortable Memory FoamThe gel memory foam provides a better contour to the shape of your body, allowing optimal relaxation for a deeper and sweeter sleep. H3 Medium & H4 Firm2 in 1 design with H3 medium firm & H4 firm, so that you can turn the mattress over, and choose the hard one if you like it better. For Different Sleeping PositionsSpecifically designed for side sleeper, back sleeper, or stomach sleeper, the mattress allows you to flexibly match various sleeping positions to achieve "ZERO" restless sleep.Colour: White+GreyFill Material: Memory FoamSpecial Features: Natural Filling, Foam Top, Hypoallergenic, Fire-RetardantTop Style: Gel Top

 Our mattresses are vacuum-packed and typically expand within 48 to 72 hours of opening, allowing any potential odors to dissipate. But sometimes it can take longer due to other external factors, such as cold weather.