M Line Slow motion 2 is a 18 cm thick mattress with open-cell visco foam. Support for this mattress is provided by profiled HR foam. The nothes in the top layer differ by each zone. The pressure is well distributed throughout the body. The new top layer consists of visco elastic foam. The cover is anti bacterial. The experience with the Slow Motion 2 is that this is a slightly harder mattress than Slow Motion 1.