Hi kj102016.
Talalay latex is generally the most breathable of all foams. Dunlop latex is also open-cell in structure and quite breathable. While it is true that cfm numbers would probably be higher for most completed mattresses using innerspring units (especially side to side in the middle of the mattress) as compared to a solid latex mattress, both choices would be quite breathable, and a coir bed rug under an all-latex or innerspring product will certainly be assistive in helping to circulate air around the product. I personally wouldn’t have breathability issues high on my list of potential drawbacks for an all-latex product.
I would be very cautious about store/brand shopping in general because you are buying a specific mattress not the brand and most manufacturers have access to the same or similar components and materials. Many manufacturers make a wide range of mattresses that can vary from lower quality and less durable materials to higher quality and more durable materials in a wide range of prices. The name of the manufacturer or store on the label or the price of the mattress won’t tell you anything about whether a specific mattress is suitable for you in terms of “comfort”, firmness, and PPP or whether there are any lower quality materials or weak links in the design that would affect the durability and useful life of the mattress. There is more about the risks of brand shopping in post #5 here and post #12 here.
Having said that … Original Mattress Factory (OMF) in general sells some good quality/value mattresses relative to most of the mainstream industry so they can certainly be a good quality/value choice that would be well worth considering as a purchase as long as you confirm that there are no lower quality materials or weak links in any of their specific mattresses that you are considering.
I’ve copied below an excerpt from one of the links in my earlier reply to you about “safe” and “safe enough for me.”
There is no consensus on which mattress or material is “best” for children but one of the most important issues for most parents is that their child’s mattress uses “safe” materials. There is also a lot more information in post #2 here and the more detailed posts and information it links to about safe, natural, organic, “chemical free”, and “green” mattresses and mattress materials that can help you sort through some of the marketing information and terminology that you will encounter in the industry and can help you differentiate between them and answer “how safe is safe enough for me” and that can help you decide on the type of materials and components you are most comfortable having in your child’s mattress and help you answer “how safe is safe enough for me”. These types of issues are complex and are generally specific to each person and their individual sensitivities, circumstances, criteria, beliefs, and lifestyle choices. Just because something is labelled as “natural” doesn’t mean that it is “safe,” and just because something lacks an organic certification doesn’t mean that it is “unsafe.”
The only reliable way to to assess the “safety” of different materials in more general terms is based on lab tests and the certifications they have for harmful substances and VOCs so that you have some assurance than the VOCs are below the testing limits for the certification (see post #2 here for more information about some of the more reliable “safety” certifications). If the materials in a mattress or the mattress itself has a reliable “safety” certification, then for most people they would certainly be “safe enough” … regardless of the type of material or the name of the manufacturer on the label.
While this applies more to babies and younger infants that are not yet able to change position … with too much soft material in a mattress the risk of suffocation with stomach sleeping increases for infants. This is more of an issue with memory foam than other materials (this of course is in addition to any chemical or off-gassing issues from synthetic materials that young children may be more sensitive to than adults). I would avoid memory foam for younger children in particular (see post #2 here).
Once you have decided on the types of materials you are comfortable with then there are also some general firmness guidelines in post #2 here for choosing a mattress for a child in different age ranges that may also be helpful.
You’re welcome.!
I look forward to what you find and what you decide to get.
Good luck!
Phoenix