Hi Mike77,
“Eco fiber pad” is a trade name that doesn’t say what the material actually is so I would need to know what the material was made of to make any meaningful comments about it.
Since they are describing it as a base layer it’s also possible that it’s a stabilization layer used under the innerspring and that the mattress is one sided rather than two sided. You would need to know the specifics of all the layers and components from top to bottom to know for sure.
When you sleep on a mattress the upper layers of foam will compress and deflect more than the deeper layers or components partly because the comfort layers are usually made to be softer than the deeper transition and support layers or components of a mattress (and firmness/softness is also a factor in the durability of a material) and partly because they are closer to the sleeping surface and subject to direct compression without any layers above them absorbing some of the compression forces first. It’s this constant deflection of the materials in the upper layers of the mattress that softens and breaks down the foam materials and leads to the loss of comfort and support of the mattress over time. This is why the quality/durability of the upper layers (the top 3" to 6" of the mattress) are especially important in the durability and useful life of the mattress as a whole because they will usually be the weakest link in the mattress in terms of durability. If the material on the bottom of a mattress is relatively durable it generally wouldn’t be a weakest link in the mattress.
[quote]The coils are said to be “TRI ZONE” at 858 (15 gauge, 14 in center third).
Also what gauge is generally preferred for people who have heavier hips? I weigh about 195.[/quote]
The gauge of the coils in an innerspring are only one of many variables that can affect the feel and firmness of the innerspring (coil number, coil shape, coil height, number of turns, coil diameter, coil arrangement, and the type of innerspring are some of the others) so by itself the gauge of an innerspring isn’t particularly meaningful.
All the layers and components in a mattress (including the cover and any quilting materials) will also affect the feel and performance of all the other layers above and below it and the mattress “as a whole” so some mattresses that use a specific innerspring may be a good “match” for you in terms of comfort, firmness, and PPP (Posture and alignment, Pressure relief, and your own Personal preferences) while other mattresses that use the same innerspring but have a different combination of materials and components on one or both sides of the innerspring may be completely unsuitable for you to sleep on. In other words … the most reliable way to know whether any innerspring mattress is a suitable choice for you will be based on your own careful testing or your own personal experience.
Since an innerspring isn’t normally the weakest link in a mattress and the useful life of a mattress will depend much more on the types of materials or components that are on top of the innerspring than the innerspring itself … if an innerspring mattress keeps you in good alignment and the mattress “as a whole” is a good match for you in terms of comfort, firmness, and PPP then the innerspring itself would be a suitable choice for that particular mattress design.
There is also more about the pros and cons of different types of innersprings in this article and in post #10 here.
Phoenix