Hello I have been lurking for a while and today decided that I need to ask for Advise. Here are the details. 41 yr old female 5’6 170lbs - stomach sleeper, but have had to change to side sleeper for back issues. In the last 5 years I started to develop lower back pain after waking up in the morning. I have now gone through 3 different mattresses and am in the trial period for the last one. The mattress that was ok for me was just a normal coil mattress from Costco (don’t have any details) it had lasted about 10 years and then had a bad sag. So the mattress craziness began. We purchased a Zinus Memory Foam 12 Inch Green Tea Mattress from amazon. The specs aren’t very clear, but it was 3" memory foam + 2 Inch comport Foam + 7" high density base support foam. This one did last about a year before the serious back pain started, but it also created a crater that was hard to move around in. Also slept very hot. It was a queen. So then we decided to move up to a king as it would give more room for me to toss and turn. We moved to the King Mattress 10 Inch, Inofia Pocket Coil & Memory Foam Hybrid Bed Mattress from amazon. This is the product info on that mattress.
nofia™ 10-inch Memory Foam and Innerspring Hybrid King Mattress.
Featuring a traditional memory foam mattress with premium support of pocket coil springs for a more durable, responsive, and supportive bed mattress.
Achieving the balance of sleeping comfort and support is better for your overall health.
Construction (Materials & Quality)
cover – micro carbon fiber, luxuriously soft, breathable for airflow
soft foam – filled with air holes for comfort and airflow
memory foam – contours to your body curve. Relieving pressure points
hard fiber layer – dual-cool for airflow and prevent you from feeling the springs
individual pocket coils – flexible, high bounce, support your full body, especially align your spine
fabric base – anti-slip, durable, offers deep support and stability
ADVANTAGE
Pressure Relief: 
Spine Alignment:
Responsiveness: Great
Edge Support: Great
Cool sleep climate: Great
Motion Transfer Reduce:
This was purchased in May of this year and already has a huge body imprint that I can barley roll out of. For the purpose of this post I will call this the Hybrid.
Then we purchased the king Endy aprox 22 days ago. We are still in the trial period and I am pretty sure we are going to send back. My pain is just as bad if not worse and I can already feel the different areas where the support has “disappeared”
I have done my research and am considering two different options and would like some input. I also want to mention that I live in the middle of nowhere in Canada and can’t go try out any types of mattresses at all right now. I would have to drive over an hour and it would put me in a COVID red zone and I am not really willing to take that chance. I have not slept on Latex.
So what I am considering is the PRESTO CLASSIC CUSTOMIZABLE MATTRESS from MFC split King or the ORGANIC DUNLOP LATEX TOPPER WITH ORGANIC COTTON SLEEVE to put on top of the Hybrid that was purchased a few months ago. What do you think? I am not sure if the topper will be enough to take the sag out of the hybrid mattress. As far as what I like to sleep in…I don’t really care at all. I just want to not wake up with back pain and not sweat all fringing night. If you are leaning towards the customizable would I customize any of the layers more or just keep with what the website has?
Also my partner is a female 230lbs 5’6 and doesn’t really have much pain while sleeping other than the odd night of hip pain. Side Sleeper.
Any and all help is appreciated. Also there is a sale on MFG right now for both of these products, but I can’t for the life of me see when the sale ends? I want to purchase during the sale, but want to get some advise here before I do so.