Just to clarify a bit - there is a noticeable difference between Talalay and Dunlop, and it’s not really that Talalay is softer than Dunlop. Most people and companies say Talalay is softer just because that’s an easier way to explain it. You can actually have a soft Dunlop layer that’s softer or firmer than a soft Talalay and a medium Talalay that’s softer or firmer than a medium Dunlop, etc. The real difference comes down to how they react when being compressed. Talalay is bouncier and springier and is generally better at contour and pressure relief on your hips and shoulders. Dunlop is denser and firmer and is generally better at support and maintaining proper spinal alignment so our most common configuration is Talalay for the top layer and Dunlop for the bottom 2 layers. We will recommend Talalay for two or more layers for customers that have things like fibromyalgia, shingles, chronic hip pain, chronic shoulder pain, or anything where they’re sensitive to pressure, or for customers that just prefer a bouncier / springier feel. Outside of those circumstances, a combination of Talalay and Dunlop offers the best chance to be successful for the average person. Again, the best way I can summarize the differences would be to say that Talalay is better at pressure relief on your hips and shoulders and Dunlop is better at maintaining proper spinal alignment and avoiding back pain. However, Talalay can also be helpful in avoiding back pain because it provides more of what we call secondary support. Secondary support fills in the gaps between your body and the mattress. For side sleepers, this is normally the area between a person’s ribs and waist. For back sleepers, this is normally the area between the small of your back and the mattress. If these parts or your body aren’t being held up by the mattress, your muscles will work all night to hold those parts of your body up, which can lead to back pain. Aside from that, women tend to be curvier, especially around their hips, and having a top layer of Talalay can help avoid hip pain and keep the mattress from pushing their hips up, which can also lead to back pain. As such, most of our customers definitely benefit from having one layer of Talalay on top, and Dunlop for the rest of the mattress, but it’s completely up to you what you would like to order.
Aside from all that, based on the information you’ve provided, I think the 10" organic latex mattress would be a great choice! I’ve included some information on how to decide on the different mattresses just below. In short, though, we would normally recommend soft Talalay over medium Dunlop over firm Dunlop for both sides of the mattress. The top Talalay layer should provide all the contour and pressure relief needed to avoid any pressure point issues and will add secondary support to the mattress. The remaining Dunlop layers should provide all the support needed to maintain proper spinal alignment and avoid back pain. Please keep in mind that our initial recommendations have a 90% success rate (we only have a 10% layer exchange rate and a 3%-4% return rate) so there’s a 90% chance that the above recommendation works perfectly for you.
Even though both sides would be the same, I would still recommend splitting all of your layers. About 95% of our mattresses go out with all split layers from top to bottom, and we get zero complaints on being able to feel the split and we get zero complaints about the layers shifting or anything like that. If all of your layers are split, you will always be able to adjust your side without affecting your partner’s side and vice versa, and you’ll have that option for the entire 20 year lifespan of the mattress. Additionally, the mattress will be easier to assemble, easier to move if needed, easier to do any layer exchanges if needed, and easier to return if needed. There really are no downsides to having all split layers.
Latex and coil hybrids typically last 10-15 years and all-latex mattresses typically last 15-20 years. All-latex mattresses offer a much finer degree of adjustability than latex and coil hybrids do. All-latex mattresses can be adjusted to be slightly softer, moderately softer, much softer, or slightly firmer, moderately firmer, much firmer. You can increase the pressure relief slightly, moderately, or vastly. You can increase the back support slightly, moderately, or vastly. Since latex and coil hybrids normally have only 2 components (3" of latex and the coils) you really have limited options to adjust the mattress, and any change that is made is normally a big change. Not everyone needs the level of adjustability that the all-latex mattress offers, but based on your experience and the information you provided, I think it would be a great choice!