Hi Steve Smith,
The Mountaintop latex has pincores (the holes in the latex) on both the top and bottom of the latex but neither the top or bottom pincores go all the way through the latex and they have different patterns that don’t “meet in the middle”. You can see a video about how they are made here but the top and bottom pincores may not both be visible from the sides depending on where the latex is cut (either through the pincores or in between the pincores) so it may “look like” the pincores are only on one side.
The layers are a similar firmness on both sides (although there may be a relatively small difference in firmness on each side) and since there is only one layer of latex in the Morgongava and the fabric and quilting is the same on both sides it is a two sided mattress and you can sleep on either side (and the mattress can be both rotated and flipped … see post #2 here).
Phoenix