Hi OnlyDreaming,
Welcome to the Mattress Forum! 
Iām glad the salesperson was able to acquire some good information for you regarding the mattress, but Iām a bit sad that they werenāt able to explain it to you (to be fair, they may not know what the numbers mean, but they should 
). Iāll do my best to decipher this for you.
This is the ticking (covering) for the mattress, and it incorporates a phase change materials (Outlast) at the Silver level. Outlast offers different levels of concentrations of their materials (listed from entry to best) of Bronze, Silver, Gold and Gold+. While a phase change material can assist a bit with temperature regulation, usage of such products in materials closest to your skin, as in a mattress pad (some brands do use Outlast) would tend to have a more noticeable impact, although it does tend to be temporary (see post #9 here).
This is your uppermost layer of foam. The numbers they seem to be using are listing the ILD first and the density next, so this would be 2" of 10 ILD (the lower the ILD, the softer the foam), 1.55 lb density polyfoam. Quilt foam is usually soft. There is a liquid gel polymer mixed with the foam that can also assist a bit with temperature regulation (see post #2 here) and in some cases can increase the durability of a softer polyfoam. The Milliken Cirrus is a flame resistant barrier used to meet federal flammability guidelines 16 CFR 1632 and 1633.
ADMIN NOTE:Removed 404 page link | Archived Footprint: milliken.com/en-us/pands/Documents/PALADIN%20nonwovens%20sep%202011.pdf
[quote]In the Eurotop (2 layers of foam)
1" 08325 Gel infused Memory Foam with Silver Level OUTLAST on surface[/quote]
1" of 8 ILD 3.25 lb memory foam. Gel infused. I donāt know if this is a liquid gel polymer or scrap gel pieces.
1" if 15 ILD 1.5 lb polyfoam. Gel infused. I donāt know if this is a liquid gel polymer or scrap gel pieces.
Iām assuming this means that the innerspring unit has a polyfoam edge reinforcement system.
1" of 24 ILD 1.8 lb polyfoam. Iām assuming that this is on top of the innerspring unit and isnāt referring to the foam edge encasement, as that would be quite thin at only 1". The āsoy basedā just means that some of the polyol used to make polyfoam is soy derived, versus petroleum. Most polyfoams in North America are using some sort of soy derived polyol in their polyfoam.
This is a pocketed spring unit using approximately 15 gauge springs in the middle third and approximately 16 gauge springs at the head and the foot of the mattress. Iām not sure of the number of springs in each size, as they arenāt specific.
This would be the base polyfoam under the innerspring unit, at 28 ILD and 1.1 lb density.
Overall, this mattress uses an amount of foam on top that is a little lower than Iād normally recommend in density (see the durability guidelines here). The 2" of 1.5 density in the quilt is stitched down, so this can help a bit with impressions, but combined with the 2" of foam beneath (3.25 lb memory foam and 1.5 lb poly), this results in 4" of softer foam and my concern would be the durability over time of these materials, especially if someone was in a higher BMI range.
Thereās more detailed information about what you need to know about the components of a mattress in the mattress shopping tutorial here.
If you have other questions, Iāll do my best to answer them.
Phoenix