Hi AnRy107,
The Jamison quilting layers are made up of a very soft polyfoam and synthetic/natural fibers which are there both for moisture wicking and breathability and to lower the softness and surface resiliency of the mattress (what is called the hand feel). The thickness of the polyfoam/fiber layers varies with the mattress. the polyfoam will soften while the fiber layer will compact and firm up so they will develop some impressions. In a choice between the two, I would tend to stick with the thinner (2") quilting layers which have an inch of polyfoam (very soft 10 ILD) because this way the softening of the foam and the compression of the fibers will have less effect. With a very soft quilting foam that is only an inch … further softening will have little effect on the performance of the mattress. The thicker 2" + fiber layer would be a little riskier in terms of softening and impressions because it’s the total amount that will make a difference not the thickness of each layer. They also told me that their new line of mattresses coming out a little later in the year won’t have quilting layers at all.
As an added note (which really isn’t really relevant to you but I thought I would include for the benefit of others who may read this) the Spring air mattresses that they also make are “in between” the specs of Jamison mattresses and the major brands in terms of quality. They also told me that they will use higher spec foams in their Spring Air on occasion because they have it available from their own supplies (depending on where in the mattress the layer is).
The Design sleep mattresses can be ordered both with and without the Euroslat system and whether it is worth it to add it to the sleeping system would depend entirely on how the mattress performed with and without it for any particular person. There are some who prefer it with the euroslat and some without. This of course would also be affected by body weight and sleeping position (heavier weights will tend to notice the effect more). The guideline here would be “is the extra cost worth any extra benefits for a particular person”. these are also very high quality mattresses but how they perform and feel for any particular person is of course important.
There are many benefits to going in this direction and it is a more “European” concept that is gaining popularity in North America. One of the benefits is that the comfort layer of the mattress (the topper) can be exchanged without replacing the mattress istelf (in the same way that a zip cover mattress allows individual layers to be replaced) and also that both the topper and the base mattress can be rotated and flipped which will add to durability … even with a durable material such as latex. These types of “sleeping systems” may seem a little odd for those who are used to finished mattresses but they are very flexible in design and the options they provide both initially and down the road.
Of course which direction to go would depend entirely on how well each fit your needs and preferences both in terms of the mattress and the options provided by the outlet you are buying from and of course the relative price of each because they are really an apples to oranges comparison (and which “fits” you best in terms of PPP or Pressure relief, Posture and alignment, and Personal preferences are just as important as price).
When you are comparing apples to oranges you are looking at making tradeoffs and decisions based on which best provides the benefits that are most important to you. The SleepTite uses a higher quality base foam (latex is a higher performance, more costly, and more durable material than good quality polyfoam) and this plus a topper would result in a higher quality sleeping system than a polyfoam/latex hybrid although this is only important if the benefits are important to you. IMO you are at least down to choices between “good and good” but in terms of “value”, depending on all the many factors involved including the price of the Jamisons which I don’t know … the Sleep Tite would probably be a little better “value” IMO.
Phoenix