Hi mellowjammer,
There are many other latex mattress options available to you if you decide to return it. The mattress shopping tutorial includes a link to the members of this site that sell mattresses online and many of them sell latex mattresses that use different types and blends of latex with a wide range of designs, features, firmness options, return and exchange policies, and price ranges that would make good choices.
If you let me know your city or zip code … I’d also be happy to let you know about any of the better options or possibilities I’m aware of in your area.
I’m not sure how long you’ve had the Sleep Science latex but there are some suggestions in post #2 here that may be helpful.
If you have already been sleeping on it for a few weeks and it’s still too firm and none of the other suggestions are helpful (and a thicker pillow may be worth trying), then you would also have the option of adding a topper to provide the additional comfort and pressure relief that you need instead of returning it and starting all over again.
If you do decide to add a topper … then post #2 here and the topper guidelines that it links to has more information about choosing the type, thickness, and firmness that would have the best chance of success.
I don’t know of anyone that has tried this combination but if you are considering either a topper or a top layer to use in a component or DIY mattress then the only way to know whether it would work well for you in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences) would be based on your own personal experience so if you aren’t familiar with how the combination will feel for you (which may be different from how it would feel for someone else) or you aren’t confident that it would be a good match for you in terms of PPP then the exchange or return policy would become a much more important part of the “value” of your purchase in case your sleeping experience indicates that it doesn’t work out as well as you hoped for.
As far as I know you can’t buy the intelligel material separately but the Intelligel topper has a 3" layer of intelligel and a cover and if you purchase the mattress protector as well then you would qualify for their 60 day trial period.
No … it’s no longer available but there are other mattresses that use different versions of buckling column gel (Somnigel and Orthogel) that may be available in your area (see post #2 here).
Phoenix