Mattress Jargon Decoded: Zoned Support, Comfort Layers and What the Terms Mean
Mattress specifications use a working vocabulary of perhaps twenty terms, and once you can read them, a product page tells you nearly everything a showroom visit would. This guide translates the lot: the construction terms, the support language, the temperature claims and the numbers, with a straight explanation of which ones matter and which are mostly marketing.
The Construction Terms
- Pocket springs. Springs sewn into individual fabric pockets so each compresses independently. The pocketing is the point: it lets the surface respond locally to your shoulder without dragging the whole row down, and it stops movement travelling across the bed. Counts vary widely with depth and design, and our own range runs from up to 1,000 in the 20cm Hybrid® Essential to up to 7,300 in the 34cm Hybrid® Ultra.
- Microsprings. Smaller springs used in the comfort layers near the surface, adding responsive give where full-size springs would be too firm.
- Comfort layers. Everything above the support core: the foams, microsprings and fibres that determine how the mattress feels in the first five minutes. Depth here governs plushness.
- Open-cell foam. Foam manufactured with a connected internal structure that air can move through, against traditional closed-cell foam that traps it. Simbatex® is an open-cell foam infused with graphite, and the open structure is the difference between foam that breathes and foam that bakes.
- Hybrid. Any mattress combining spring and foam systems, which in practice means pocket springs under foam comfort layers. The construction now dominates the mid-market because it takes the pressure relief of foam and the airflow and response of springs together.
The Support Terms
At Simba, our mattresses are built around zoned spring support, so here’s what we mean when we talk about it:
- Zoned support. Firmness varied deliberately across the mattress surface, firmer under the hips where weight concentrates and softer under the shoulders where sink helps alignment. Genuine zoning is engineered into spring tensions or foam cuts, and it's among the most functional features on this list because spines are shaped, not flat.
- Firmness ratings. The soft to firm scale, usually out of ten, describing surface feel. Medium-firm mattresses tend to be the universal standard for most people when it comes to support and comfort.
- Motion isolation. How little a sleeper feels a partner's movement.
- Edge support. How the perimeter holds under weight, which decides whether the full width of the mattress is usable and whether sitting on the edge collapses it. Reinforced spring borders do this best.
The Temperature Terms
- Temperature regulation. This means a mattress comes with cooling properties. For example at Simba, temperature regulation is built into the design and the technology using graphite-infused Simbatex® foam.
- Graphite-infused. Graphite conducts heat, so foam carrying it moves warmth away from the body faster than plain foam. One of the more evidence-grounded cooling approaches.
- Cool-touch covers. Fabric engineered to feel cool on contact, like our Stratos® technology.
- Wicking. Fabric moving moisture away from the skin, borrowed from sportswear. Useful in covers and bedding as a supporting feature, though it's rarely a reason to buy on its own.
FAQs
It varies firmness across the mattress to match how body weight distributes, typically firmer under the hips and softer under the shoulders. The result is a spine held closer to neutral, particularly for side sleepers, and it's one of the most functional features in the specification list.
Some higher spring counts are definitely worth the extra investment, especially if you enjoy a premium, plush feel when you sleep.
Memory foam describes how the material responds, moulding slowly under heat and pressure. Open-cell describes its internal structure, connected air pockets that let the foam breathe. A foam can be both, and open-cell structure is what separates cooler modern foams from the heat-trapping originals.
No. The term is unregulated and simply signals a firmer feel. No certification body approves orthopaedic mattresses, so judge the construction and firmness against your own needs.
Construction type, depth, zoning, a named cooling mechanism, edge reinforcement, and the trial and guarantee lengths. Together they describe how the mattress supports, breathes and lasts. Firmness matters too, though it's a personal preference and says nothing about quality.
