Pressure Relief Extra Firm iCoil® Hybrid Mattress

I'm a skinny 150 lbs guy with scoliosis. For more than a decade, I slept on a mattress made by a small local manufacturer, a simple medium firm innerspring mattress with an Eurotop and it was fine. Also, when I go to hotels and Airbnb's, I sleep usually well and pain-free. I'm just back from France where I spent one week on a child mattress in my friend's guest bedroom and it was perfectly fine. The nightmare at home began in 2021 when I had to change my old locally made Eurotop mattress. -Cheap Zinus foam mattress bought on Amazon. It was okish once a memory foam topper was added to it, but still would give me frequent back pain that would wake me up. -Plush Wayfair mattress: way too soft, horrible violent back pain, couldn't return it, resold it, went back to the Sinus -Tuft n Needle horrible mattress: way too painfully rigid. They refunded me, made me keep it, it's now in the guest bedroom. Guests love it. Go figure. -Zinus hybrid mattress that was allegedly medium firm. It was a brick. Even with a memory topper on top of it, it was a brick. Amazon refunded me, didn't take it back, I resold it. At this point, I did all the mattress stores in my city, bought a big brand mattress that was way too soft. I couldn't return it, only exchange it. Ended up almost forcefully (nothing else was working in the store) with a Kingsdown mattress that was the softest Kingsdown mattress of the collection, but still too rigid for me. Sleeping on the side, I would wake up in horrendous pain after two hours. I have added a topper and if I sleep on my side, I'm ok until 5-6 am, where the back pain starts, but if I turn on my back during the night, I will wake up with violent pain. During Black Friday, I ordered a medium firm Silk n Snow. A brick. A mixture of granite and brick. Completely unusable. After some hassle and delays, they took it back. I once again did all the mattress stores in a radius of 150 km radius and tried everything. At my local Sleep Country, there was a heavy discount on a Casper Snow, $1000 CAD. Big mistake. That thing is waaaay too soft! Violent back pain that lasted for hours during the whole morning. I'm going to exchange it but I'm locked in to what they offer at Sleep Country. Any suggestions around that price or lower? What to look for? The firmness scale seems to mean nothing, it varies widely from one brand to the other. The softest Kinsgdown mattress is too rigid for me while a Casper that is allegedly medium first is way too soft. How to properly test the mattress in store? Which mattress could reproduce the usual hotel or Airbnb experience? In Airbnbs, it often seems to be older mattresses on older box springs. It works well for me. Why would a mattress made for children work so well for me while so many popular brand mattresses don't work at all?

I'm a skinny 150 lbs guy with scoliosis. For more than a decade, I slept on a mattress made by a small local manufacturer, a simple medium firm innerspring mattress with an Eurotop and it was fine. Also, when I go to hotels and Airbnb's, I sleep usually well and pain-free. I'm just back from France where I spent one week on a child mattress in my friend's guest bedroom and it was perfectly fine. The nightmare at home began in 2021 when I had to change my old locally made Eurotop mattress. -Cheap Zinus foam mattress bought on Amazon. It was okish once a memory foam topper was added to it, but still would give me frequent back pain that would wake me up. -Plush Wayfair mattress: way too soft, horrible violent back pain, couldn't return it, resold it, went back to the Sinus -Tuft n Needle horrible mattress: way too painfully rigid. They refunded me, made me keep it, it's now in the guest bedroom. Guests love it. Go figure. -Zinus hybrid mattress that was allegedly medium firm. It was a brick. Even with a memory topper on top of it, it was a brick. Amazon refunded me, didn't take it back, I resold it. At this point, I did all the mattress stores in my city, bought a big brand mattress that was way too soft. I couldn't return it, only exchange it. Ended up almost forcefully (nothing else was working in the store) with a Kingsdown mattress that was the softest Kingsdown mattress of the collection, but still too rigid for me. Sleeping on the side, I would wake up in horrendous pain after two hours. I have added a topper and if I sleep on my side, I'm ok until 5-6 am, where the back pain starts, but if I turn on my back during the night, I will wake up with violent pain. During Black Friday, I ordered a medium firm Silk n Snow. A brick. A mixture of granite and brick. Completely unusable. After some hassle and delays, they took it back. I once again did all the mattress stores in a radius of 150 km radius and tried everything. At my local Sleep Country, there was a heavy discount on a Casper Snow, $1000 CAD. Big mistake. That thing is waaaay too soft! Violent back pain that lasted for hours during the whole morning. I'm going to exchange it but I'm locked in to what they offer at Sleep Country. Any suggestions around that price or lower? What to look for? The firmness scale seems to mean nothing, it varies widely from one brand to the other. The softest Kinsgdown mattress is too rigid for me while a Casper that is allegedly medium first is way too soft. How to properly test the mattress in store? Which mattress could reproduce the usual hotel or Airbnb experience? In Airbnbs, it often seems to be older mattresses on older box springs. It works well for me. Why would a mattress made for children work so well for me while so many popular brand mattresses don't work at all?