Hi Sleepylorlor,
Welcome to the MattressUnderGround, we are glad to have you here.
The first thing that comes to mind before we delve into figuring out how to find you a suitable replacement of you beloved topper, is the age of your current one.
It’s possible for a memory foam topper to lose weight or density over time, especially after 15 years of use. Memory foam, like many materials, can break down and lose its original characteristics due to factors such as compression from body weight, exposure to moisture, temperature fluctuations, and simply aging.
Case in point, I purchased a Tempurpedic Neck pillow back in 1993, just about the time soon after they hit the market. I purchased 2 new ones in 2017. Supposedly, according to Tempurpedic, the new ones were the exact same formula as the original, as a matter of fact, they told me, it was the only product they sell that was exactly the same formula as the original, with new products reformulated to be less dense, less heat absorbing and somewhat softer then the original formula.
I mention this because when comparing the newly purchased pillows, (now 7 years old) verses the original from 1993 almost 31 years old, there is no comparison in the firmness, density and weight of the two.
As products degrade over time, our senses adapt to those changes, and because this happens over a longer period, the subtle changes tend to go unnoticed, in the case of a topper or pillow, your body starts to exhibit pain in areas that were previously not there, due to no fault of your aging body. The materials have degraded, become softer and your body begins to reject it.
The problem lies in our ability to have know when the most significant change in the pillow or topper had occurred. Was it at the 5 year point, 10 or 15. This makes it very hard to duplicate what we once loved as weighing the material is not accurate, finding the same formula in a current product would certainly be challenging and remembering when it felt best it a time long passed. Even the size of your topper is a bit off. The closest mattress is a full size base on the numbers you have provided.
Off the top of my head, this topper would be one I am familiar with and closest in their 2" that immediately comes to mind.
It’s important to consider how the comfort of your current topper might have changed over the years. The feel you’re accustomed to now may not accurately reflect what made the topper comfortable when it was new.
It is certainly possible that your topper was originally 1.5 inches thick, but it’s also worth considering that it may have been thicker initially (such as 2 inches) and has compressed, degraded, or shrunk over time due to various factors.
My suggestion is to purchase a new topper as similar you “think” is the one you have now, but treat it as a fresh start. Use this new topper as your benchmark to gauge comfort and performance. If it feels too soft or doesn’t quite meet your expectations, you can explore options like a firmer topper or one with a higher density.
Even if you knew the exact make and model of your current topper, the reality is that a new one will naturally feel different due to changes in its characteristics over time. Embracing this trial-and-error approach will likely be the most effective way to find a replacement that suits your needs.
Best of luck with your search!
Maverick