Latex mattresses are the Cadillac of all mattresses. All latex and foam mattresses are "no flip" mattresses. The quality of the product is such that it does not require flipping or turning.
Most latex mattress just have one size of holes through the whole mattress so the mattress has a uniform feel right through. Some cores, though, are made with different sections of latex with different sized holes. This allows the bed to have different zones - softer under the shoulders and feet and firmer under the hips. Finally, many latex beds layer other materials (whether softer latex or memory foam, etc) on top of the latex core to give the bed a softer or more springy feel. Latex mattresses have a nice energetic feel and they are very loyal. I think that latex makes a great core and is a big improvement over inner springs and denser and more extensive than foam cores.
Today, most latex mattresses tend to be either made of synthetic latex or more typically a combination of synthetic and natural latex. The manufacturer's of these combination latex mattresses that I talked with claim that a combination makes the whole latex core more flexible. Of course, the all natural latex manufacturers said this was debris - that an all natural product is just as flexible and is actually made of natural rubber. To a degree I think that it is just a matter of costs - synthetic latex may be cheaper and so more cost effective to use in a mattress. Are there advantages to going natural latex over the synthetic? I can't say that the quality of the mattress will be at variance, but I just have a personal predilection to the natural rubber from a tree as opposed to a synthetic. This may just be my aesthetic taste, but I just lean toward a natural product over a synthetic copy all things being equal. But be warned, you may pay more for the natural latex mattress and also find that finding an all natural latex mattress is difficult.
