Thanks for considering DLX. Based on the information, it appears someone else recently reached out with very similar details. I’m posting our response here in case you are not the same person, but the questions, height, weight, and preferences were similar. If it was you, feel free to respond directly to the email we sent. If not, you can reply here and we’ll be happy to help.
Given your height and weight and the mix of back and side sleeping, we would only recommend the 14" Hybrid. The 12" is something we typically don’t recommend for side sleepers, and as a light sleeper you’ll still get plenty of support from the 14". It will give you a bit more pressure relief for the shoulder and hip without feeling soft or sinky.
We don’t use Serene foam and none of our latex or pocket coils are zoned. The Hybrid uses a consistent-density 3" comfort layer over a pocket coil unit that has two rows of firmer edge coils around the perimeter for seating support but no zoning in the center of the mattress.
Regarding your concern about pushback: many people in your situation prefer the Premier Hybrid over latex for that exact reason. Our foam isn’t memory foam and it isn’t Serene foam. It’s a high-performance polyurethane foam with good pressure relief for most people and it avoids that “stuck” feeling or the springy pushback you may have noticed in some latex builds.
We do ask that customers donate the mattress locally if a refund is needed, but we understand that some areas have limited charity options. It’s usually much easier to donate something that’s only a couple of months old and barely used. While a local charity is ideal, it doesn’t have to be a brick-and-mortar organization and many customers successfully use BuyNothing groups, Freecycle, a local church, shelter, or even a community member in need. Any of those options are perfectly fine. We just ask for a few photos documenting the donation.
Yes, you can order a split in medium/firm to test things out. Within the first 120 nights, we offer a one-time adjustment at no cost. We just ask that you sleep on the mattress for 30 nights and then reach out. We’ll have a few follow-up questions and may suggest a couple of simple in-home tests to help us determine the best firmness for you.
Yes with the Premier Hybrid or LatexLux, you can purchase replacement foam layers in the future. The zippered top is specifically designed so firmness can be adjusted over time. One advantage of the Premier Hybrid is that the 3" comfort layer can be replaced down the road if needed. We sell replacement layers at a discount for DLX customers. Pricing is hard to predict in the future. These aren’t listed on our site, but if you ever need one, just reach out. The mattress is also “hackable,” meaning you can even use a compatible 3" layer from a third party if you prefer.
Since you prefer a firm, supportive feel, keep in mind that everything underneath the mattress all the way down to the floor will affect how supportive it feels. Would you mind sharing what you plan to place the new mattress on? A bed frame, box spring, platform bed, adjustable base, etc.? Feel free to send photos or links if that’s easier.
Thanks again for reaching out and happy to help you sort through all of this whenever you’re ready.