Hi car8857,
Enso is one of many brands that are made by Zinus which is a Chinese manufacturer that makes mattresses that tend to use lower to medium quality/density foams in their mattresses. You can read a little more about them in post #2 here.
I would also make sure that you read post #6 here about the additional risk and uncertainty involved with purchasing any mattress that is shipped compressed from China.
The specs for the mattress that you listed are also incomplete so there is more information that you would need to make an informed choice (see this article). Listed from top to bottom …
2" 4 lb. PureGel Infused Memory Foam: This is a medium density memory foam which would be fine.
2" Quick Recovery Convoluted Foam (QRC): I would want to know the type and density of this layer and the convoluting would also reduce its durability so I would want to make sure this was a high quality material.
2" 3-4 lb. Tri-Tech Memory Foam: When you are given a density range then I would assume it was the lower density which is this case would be 3 lb which is a lower quality material than I would be comfortable with. Since it’s deeper in the mattress underneath other layers it would add to its durability but I would generally tend to avoid 3 lb memory foam in the upper layers of a mattress unless you are in such a low budget range that there are no other options available.
6" HD Polyurethane Base Foam: I would also want to know the density of the polyfoam in the support core although it will have less effect on the durability and useful life of a mattress.
These layers add up to 12" so if the mattress is 12" thick then you know you have all the layers.
I would be very cautious here because this would already be a somewhat risky choice with 2" of 3 lb memory foam and an additional 2" of convoluted foam (of unknown type or density) in a Chinese manufactured mattress and I would want to confirm the missing specs to make sure there are no additional lower quality materials in the mattress before I considered it and even then I would make some careful comparisons to other mattresses that use higher quality materials.
Phoenix