The 160cm double mattress comes in two half of 80cm with a light and thin connecting layer on top. The cover is not tight enough to hold both sides tightly and the system doesn't work very well unless the bed frame is deep enough to keep all of the layers in place. The fact that each latex piece is heavy as well as moves, adds extra difficulties to making the bed. The connecting top layer is too thin to compensate for the space between the sides as a result of all the layers not staying in place. In principle this mattress should work well but in practice it doesn't because latex plus graphite ( the "natural" fire retardant used in latex) makes everything so so heavy, difficult to align inside the cover and the cover itself doesn't keep the various sections tightly snugged. As a mainly front sleeper I would say that is is also slightly too soft despite the fact that is says on the website that it can be made into a firm mattress it doesn't really