Hi Dog Lover,
You’re welcome … I also realized I didn’t link the foundation post in the part about box springs and foundations but it’s corrected now.
I really have no way to know this because I can’t feel what you feel or see you on the mattress. This is the part of mattress shopping where you will need to rely on your own careful and objective testing for PPP (Posture and alignment, Pressure relief, and Personal preferences) using the testing guidelines in the the basic information post here. Softness, firmness, and “feel” are also subjective and only you can know what feels soft or firm to you (regardless of how it feels for anyone else).
I also wouldn’t pay much attention to online reviews (see post #13 here). Latex is the most durable of all the foam materials regardless of which manufacturer uses it in their mattress and outside of actual defects in manufacturing (which can certainly happen on occasion) it softens less than other foam materials. Having said that … softer versions of any material will soften more than firmer versions and the softer versions of LI’s 100% natural Talalay will soften faster and is less durable than the blended Talalay especially with people that are in a higher weight range. In some cases people will often talk about a mattress sagging when in fact they have chosen a mattress that is too soft and they are sinking in too much. If Savvy Rest was having a sagging issue then every other manufacturer that used the same materials (which is a lot of mattress manufacturers) would be having the same issues … and of course they aren’t. The materials in a mattress are always more important than the name of the manufacturer who makes it.
All mattresses will go through some degree of break in period where the foams soften a little, the cover, quilting, and other fabrics stretch a bit, and any fibers will compress. This is a normal part of all new mattress purchases although latex will soften less than most other materials.
Latex is also very “point elastic” which means it contours very well to the shape of your body and compresses in the specific areas where weight is concentrated with less effect on the areas around it so it’s not unusual to sink in more when you are sitting on it … particularly with softer latex. When you are lying down it is also very supportive because it also gets firmer faster with deeper compression than other materials. You were almost certainly feeling the firmer Dunlop and the effect of all the layers firming up as they are being compressed when you sat on the latex because it would take a very high weight to even come close to bottoming out on 9" of latex with that configuration.
Phoenix