Leesa

Hi phewd,

“Virtual” impressions like this would be fairly typical of softer mattresses that use lower quality materials. This normally means that you chose a mattress that isn’t suitable for you in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences) which would be aggravated by the lower quality materials in the mattress and higher weights which will will both lead to foam softening more rapidly than would be the case with higher quality materials. In cases like this where you are “on the edge” of the comfort/support range that is suitable for you even the normal break in period of a mattress during the first few weeks of ownership will often be enough to take you outside of the comfort/support range that is suitable for you (see post #2 here).

The durability of memory foam isn’t linear with density and 4 lb memory foam will noticeably soften more quickly than 5 lb memory foam for those who are in higher weight ranges especially. Choosing thicker/softer comfort layers than are suitable for your needs and preferences or your weight range can also affect both the suitability of a mattress in terms of PPP and the durability of the mattress as well (firmness/softness is also a factor in the durability of a material). This is why I would reduce or minimize the use of 4 lb memory foam in a mattress as much as possible for those who are in higher weight ranges because thinner layers of lower density materials will have less effect on foam softening over time than thicker layers of the same material.

Yes this is one of the two main strategies I would suggest in your situation and would be a good direction to go especially if there are no mattresses in the store that would make a suitable choice in terms of budget, suitability, or durability. A mattress that has the least possible amount of lower quality or “unknown” materials will usually be firmer (there is less cushioning on top of the mattress) but will also be more durable and then you can add your own comfort layer to the sleeping system in the form of a topper (and there are many high quality and durable toppers available) to provide the additional "comfort and pressure relief that you need.

While there are some risks involved in this because choosing a suitable topper that is a good “match” both for you and the mattress you are using it on can be somewhat uncertain and can be almost as difficult as choosing a mattress in the first place (unless you can test the combination in person) … a topper will also absorb much of the compression forces that soften or break down foam materials so it can increase the durability of the mattress underneath it and it would also have the advantage of being able to replace just the topper if it softens or breaks down more quickly than the mattress underneath it or if your needs and preferences change over time without having to replace the entire mattress.

If you do decide to go in this direction and if you can’t test a specific mattress topper combination in person (and are buying the topper separately after purchasing the mattress) then post #2 here and the topper guidelines in links to has more information that can help you use your experience on a mattress as a guideline and reference point for choosing the type, thickness, and firmness for a topper that has the least risk and the best chance of success.

The Tempurpedic mattresses tend to use better quality materials but for most people they wouldn’t be in a good “value” range compared to many other mattresses that use similar quality/density materials and sell in much lower budget ranges. I would be very cautious about choosing any mattress which uses thicker layers of 4 lb memory foam because of the greater risk of premature foam softening (this would apply more to your weight range) and I would test any mattress that you are considering very carefully (hopefully using the testing guidelines in the mattress shopping tutorial) so that you are confident that you aren’t “on the edge” of choosing a mattress that is once again too soft for you in terms of PPP which could lead to having the same issues once again much too quickly relative to the price you are paying for the mattress.

Phoenix