Hello, new to the forums. I’m in the market for a budget bed (under 250) and after reading through the many pages of advice on this website, I’ve come to two choices. Either Zinus, or Olee sleep.
Zinus seems to be the most popular low budget brand, but the fact that I can’t see their ILD worries me.
Olee sleep on the other hand lets you know right off the bat. However I’m not a fan of their multilayerd foam designs.
What do you guys think of these two brands? Which would you lean towards more?
Hi Lalafell09,
Welcome to the Mattress Forum! 
I’m not quite sure where you would have found the advice to pursue either of these two companies on this forum, as that wouldn’t be the case.
For starters, if you are working with a more restricted budget, post #4 here and the posts it links to also include many of the better lower budget online options I’m aware of. Neither Zinus or Olee would be on that list.
While you may have read somewhere that Zinus is “the most popular low budget brand”, it wouldn’t have been here on this site. And even if you had read somewhere that someone considered this to be the case, while other people’s comments about the knowledge and service of a particular business can certainly be very helpful, always keep in mind that you are the only one that can feel what you feel on a mattress and I would be cautious about using anyone else’s suggestions, experiences or reviews on a specific mattress (either positive or negative) as a reliable source of information or guidance about how you will feel on the same mattress or how suitable or how durable a mattress may be for you. In many if not most cases this can be more misleading than helpful because a mattress that would be a perfect choice for one person or even a larger group of people in terms of comfort, firmness, and PPP (Posture and alignment, Pressure relief, and your own Personal preferences) may be completely unsuitable for someone else to sleep on (even if they are in a similar weight range). In other words, other people’s experiences in general won’t tell you much if anything about the suitability, quality, durability, or “value” of a mattress for any particular person (see post #13 here).
Regarding both Zinus and Olee Sleep (Grantech International), I would also read post #6 here about mattresses imported from Asia or China and which may have been compressed for long periods of time in either shipping or storage before being purchased, and being sourced in China would make this somewhat of a risky purchase IMO.
Overall, the best advice I can offer you would be to read the mattress shopping tutorial here which includes all the basic information, steps, and guidelines that can help you make the best possible choice, and perhaps more importantly know how and why to avoid the worst ones.
Two of the most important links in the tutorial that I would especially make sure you’ve read are post #2 here which has more about the different ways to choose a suitable mattress (either locally or online) that is the best “match” for you in terms of “comfort”, firmness, and PPP (Posture and alignment, Pressure relief, and your own Personal preferences) that can help you assess and minimize the risks of making a choice that doesn’t turn out as well as you hoped for and post #13 here which has more about the most important parts of the “value” of a mattress purchase which can help you make more meaningful quality/value comparisons between mattresses in terms of suitability (how well you will sleep), durability (how long you will sleep well), and the overall value of a mattress compared to your other finalists based on all the parts of your personal value equation that are most important to you (including the price of course and the options you have available after a purchase if your choice doesn’t turn out as well as you hoped for).
Outside of PPP (which is the most important part of “value”), the next most important part of the value of a mattress purchase is durability which is all about how long you will sleep well on a mattress. This is the part of your research that you can’t see or “feel” and assessing the durability and useful life of a mattress depends on knowing the specifics of its construction and the type and quality of the materials inside it regardless of the name of the manufacturer on the label or how a mattress feels in a showroom or when it is relatively new so I would always make sure that you find out the information listed here so you can compare the quality of the materials and components to the durability guidelines here to make sure there are no lower quality materials or weak links in a mattress that would be a cause for concern relative to the durability and useful life of a mattress before making any purchase.
After reading through this information, you’ll see that the density of the foam layers, not the ILD, would be the important information to acquire regarding componentry durability.
I hope that this information helps you “reset” your mattress shopping process and also arms you with some better tools to make a good choice for your budget. 
Phoenix