Mattress Forum

ILD means how much weight it takes to compress a block of foam to 25% of it's thickness. Higher is firmer and lower is softer.

Latex in general is "firmer" than other types of foam. This is because it has a "response curve" that gets firmer faster when it's compressed than other types of foam. Many people are surprised at how "firm feeling" and "supportive" even the softer ILD's are.

When you are as light as you are, the softer ILD's will feel firmer to you than they would to someone that is heavier. Also because you are so light you would be able to buy a thinner mattress that someone who was heavier with the same benefits. There is no benefit to buying more latex than you need and in some cases it can be counterproductive. I am guessing you would likely need 2" of softer latex (ILD to be determined) over 4-6" of firmer latex (6 would be the "norm"). So the range of suitability for you would be somewhere between 6" and 9" depending on several factors and preferences.

What is over the latex is personal preference. A thicker less "elastic" layer (such as most wool) will make the mattress feel firmer and allow slightly less "sinking into" the latex. The choice is as much about personal preference as anything else in most cases and there is much debate about the different quiltings and tickings (covering material) that can be used. My personal preference with wool is to add it as a mattress pad since when it's part of the mattress construction you cannot remove it and air it out (unless you have a zip cover which most of the do it yourself ones do have). I still believe that a very elastic fabric layer over the latex would usually be better only because it would let you "test" the feeling of having latex closer to you and wool can always be added later as a mattress pad. Wool and other natural fibers have many benefits for sleeping on including breathability and moisture regulation. Latex as well is very breathable (different types to greater or lesser extents) and the breathability is what also regulates the moisture that may get into it. It is also important to have slats under it so air can enter underneath.

You also have several very good lower cost options besides an "all latex" mattress. In general there are two main layers inside your mattress. The top 2-4" is the comfort layer and it is mainly responsible for relieving pressure points. The layers under this are the "support layers" and they are mainly responsible for keeping you in alignment. This is an oversimplification but it close enough for this post. If you use latex as a comfort layer, you could use either a good quality innerspring or high quality polyfoam (called HR polyfoam) as your support layer and still have a very high quality long lasting mattress for a lower cost. This option in a full size could well put you in range of your budget with some good research. Even a very low cost mattress with next to no polyfoam over decent springs with a latex topper would do well here although local manufacturers would in many cases make something like this as well. Some of the links I posted have some options like this as well.

When you "unwrap" compressed latex, it will "whoosh" back into shape as it is very elastic. There is nothing you need to do except be careful cutting the packaging material so you don't damage the latex. Make sure you cut the packaging open on top of what you are putting it on as it is also quite heavy and a little difficult to carry around. This is different from compressed memory foam which will often take some time to come back and even some polyfoam as well.

I know you are "under the gun" in terms of time but a little research now that you've "opened the door" can lead to some very good options and would be well worth it. A little bit of field testing would also help more than anything else. This involves laying on mattresses in stores where you know what is in them so you can find out what you want to "duplicate". If you for example lay on a mattress in a store that has 2" of latex on top and another one that is similar with 3" on top, you would get a fairly clear idea of what is best for you. It will also help you decide on how firm the top layer should be for you. All you need to do is find something to sleep on in the meantime :)

Phoenix

PS: Foambymail was not on my "good value" list because you can never be certain that what you order from them is what you thought you were ordering in terms of type of latex and ILD. Sometimes it is and sometimes it isn't. There are several on the list that have comparable (or lower) pricing than foamorder as well and this is especially true if you are ordering Talalay latex (springier and softer) for your comfort layer instead of Dunlop (firmer and a little less "springy) which would probably be preferable ... although only field testing could tell you for sure. Most people prefer Talalay in their comfort layers even though it is often a little more than most Dunlop.