Understanding what is inside a spring mattress, what each component contributes, and how the layers work together helps you evaluate options more clearly when choosing a new mattress. This guide explains the internal construction of a modern spring mattress in plain terms.
The Core: The Spring System
The defining feature of a spring mattress is its coil system. In quality modern mattresses, this is a pocketed spring system where each coil is individually encased in its own fabric pocket.
Each pocket spring operates independently. When weight is applied to one spring, the adjacent springs are not directly affected. This is what creates the motion isolation that pocketed spring mattresses are known for: when one person moves during the night, the springs beneath them compress without pulling or pushing the springs beneath the other person.
The springs provide the primary structural support of the mattress. They compress under body weight and push back with a force that distributes load and maintains support. The quality of the springs, including the gauge of the wire, the height of the coils, and how they are tempered, determines how responsive and durable the support is.
Higher coil counts, meaning more springs per unit area, generally allow for finer, more localised support. However, coil count alone is not a sufficient quality indicator. The quality of the individual springs and how the system is constructed matters alongside the count.
The Comfort Layers Above the Springs
Above the spring core are comfort layers that determine how the mattress feels directly against the body.
Foam comfort layers are the most common. These may be standard polyurethane foam, memory foam, or a combination. The foam cushions the body, reduces pressure at contact points, and transitions the feel from the responsive spring system below to the sleeping surface above.
Latex comfort layers are used in some hybrid constructions. Natural latex provides a responsive, buoyant feel with good breathability. In Singapore's climate, latex comfort layers are a strong choice for managing warmth.
A quilted or padded cover sits above the comfort layers. The cover fabric and its construction affect both the surface feel and breathability. Natural fabric covers in cotton or similar materials manage moisture and heat better than synthetic alternatives in Singapore's humidity.
Below the Springs: The Foundation
Beneath the spring core is typically a base layer of foam or a fabric panel that provides a stable foundation and prevents the springs from sitting directly on the bed frame. This layer also contributes to edge support in some constructions.
The Edge Support System
Quality spring mattresses include additional edge support, either through firmer foam at the perimeter or a more rigid construction at the sides. This prevents the edges from collapsing when weight is applied to them, which extends the usable sleeping surface to the full mattress dimensions and makes sitting on the edge of the bed comfortable and stable.
What This Means for Your Sleep in Singapore
The spring core's open structure allows air to circulate through the mattress. In Singapore's warm and humid climate, this natural ventilation is a meaningful daily benefit. The mattress stays cooler and fresher than a sealed foam construction.
The independence of pocketed springs reduces motion transfer for couples. When one partner moves, the springs beneath them respond without significantly affecting those on the other side.
The Somnuz pocketed spring mattress collection includes options designed for Singapore's conditions with clear construction details. For guidance on what suits your sleep needs, visit our mattress showroom in Singapore to see and try the range in person. The full Somnuz mattress collection covers spring, foam, and latex options.
Frequently Asked Questions
What are the springs inside a mattress made from?
Tempered steel wire. The wire is wound into coil shapes, heat-treated to improve resilience and durability, and in pocketed spring constructions, individually encased in fabric pockets.
How many springs should a good mattress have?
This varies by mattress size and coil diameter. Higher counts generally allow finer localised support, but quality of individual springs matters alongside count. A mattress with clearly described spring construction and quality indicators is more informative than one that leads primarily with coil count figures.
What is the difference between pocketed springs and traditional innerspring?
In pocketed spring systems, each coil is individually encased and operates independently. In traditional interconnected innerspring systems, coils are linked. Pocketed springs provide better motion isolation and more localised support.
Why does a spring mattress suit Singapore's climate?
The open structure of the spring core allows air to circulate through the mattress, helping regulate sleeping temperature. This natural ventilation is more effective in Singapore's warmth than a sealed foam construction.
What are the comfort layers on top of the springs?
Typically foam, latex, or a combination. These layers cushion the body, reduce pressure, and create the surface feel. The quality and type of comfort layer materials significantly affect sleeping comfort and breathability.
How long does the spring system inside a mattress last?
Well-made pocketed spring systems are designed to last ten years or more. The springs retain their resilience when made from properly tempered steel at an appropriate gauge. The comfort layers above the springs may show wear before the spring system itself does.
Find the Right Spring Mattress for Your Sleep
Understanding what is inside a spring mattress makes it easier to compare options and choose well.
Browse the Somnuz pocketed spring mattress collection or the full mattress range to explore options with clear construction details. Or visit our showroom in Singapore to try the range in person.