This mattress, with its> 20cm, so thick that they simply compensate for the settings of the slatted base mostly, which is not the intention. If I lie down on the slatted Baren, he adapts perfectly to the body, particularly clear this is lying on the side: I Then put the mattress on my upper body touches practically only at the hips and shoulders the mattress.
Advantage of thickness: the mattress but adapts to almost exactly the same, if you just laying on the floor and used without slatted frame.
Conclusion: If you want to use no slatted or no broad shoulders / hips / swayback / etc. has, this mattress is a good choice