Memory Foam Mattress vs Spring Mattress: Which Is Right for You?

Choosing between a memory foam mattress and a spring mattress is one of the most significant decisions you'll make for your sleep. Both types have loyal fans, and both have genuine trade-offs. The right choice depends on how you sleep, how warm you run at night, and what you value most in a bed.

Memory foam mattresses contour closely to the body and excel at pressure relief and motion isolation — best for side sleepers and couples. Spring mattresses offer responsive bounce, natural airflow, and firmer support — better for back, stomach, and combination sleepers. Foam typically lasts 7–10 years; springs last 5–8. Traditional foam runs warmer, but modern cooling-engineered foam (gel, open-cell, phase-change covers) has largely closed the temperature gap. Choose based on sleep position, temperature preference, and how often you change positions overnight.

Key Takeaways

• A memory foam mattress contours closely to your body and excels at pressure relief — ideal for side sleepers and those who share a bed.

• A spring mattress offers more bounce, better natural airflow, and a firmer, more responsive feel — better suited to back and stomach sleepers.

• Memory foam typically lasts longer (7–10 years) than spring (5–8 years), but spring mattresses are naturally cooler.

• Modern foam with gel infusion, open-cell structures, or phase-change covers has significantly closed the temperature gap. Koala's mattress range uses proprietary Kloudcell® open-cell foam for cooler-sleeping comfort.

• Your ideal choice comes down to sleep position, temperature preferences, and budget.

Memory Foam Mattresses Explained

A memory foam mattress uses viscoelastic foam as its primary comfort layer. Originally developed by NASA in the 1960s, memory foam responds to both body heat and pressure — softening and moulding to your shape as you lie on it.

Construction and heat response. Traditional memory foam is a dense, slow-response foam. Your body heat warms the material, which causes it to soften and conform to your body's curves. Beneath the comfort layer sits a denser base foam for structural support. Modern versions often use an open-cell structure — like Koala's proprietary Kloudcell® — gel infusion, or ventilated channels to improve breathability, directly addressing the heat-retention drawbacks of older foam designs. For a deeper look at foam types and construction, see our foam mattress guide.

Pressure relief and contouring. Memory foam distributes your body weight evenly across its surface. This is especially useful for side sleepers, whose hips and shoulders create concentrated pressure points on firmer surfaces. The foam cushions these areas rather than pushing back against them, which can reduce discomfort and morning stiffness.

Motion isolation. Memory foam absorbs rather than transfers movement. If your partner tosses and turns, you're far less likely to feel it on a foam mattress than on a spring one. This makes a memory foam mattress a popular choice for couples and light sleepers.

Temperature sensitivity. According to the Sleep Foundation, traditional memory foam can retain body heat more than other mattress types — because the material responds to heat to create its contouring feel, warmth tends to build up around the body. This is a real drawback for hot sleepers, and the reason most modern foam designs now layer in cooling technology.

Durability. Memory foam mattresses typically last 7–10 years, according to the Sleep Foundation. Over time, foam gradually loses its ability to spring back fully and can develop permanent body impressions. Higher-density foams resist this compression for longer.

Spring Mattresses Explained

A spring mattress — also called an innerspring mattress — uses a network of metal coils as its primary support system. Spring mattresses have been the dominant mattress type for over a century, prized for their responsiveness and natural airflow.

Innerspring and coil construction types. There are several types of spring systems used in mattresses:

• Bonnell coils — traditional hourglass-shaped coils connected by a wire frame; common in budget mattresses.

• Offset coils — similar to Bonnell but with a hinged design for slightly better contouring.

• Continuous coils — a single wire looped into many coils; durable and affordable.

• Pocket coils (individually wrapped) — each coil sits in its own fabric pocket and moves independently. These offer better motion isolation and contouring than connected coil systems and are found in higher-quality spring mattresses.

Coil count and gauge (wire thickness) both affect support and longevity.

Support, bounce, and responsiveness. Spring mattresses push back against your body rather than conforming to it. This creates a responsive, buoyant feel that many back and stomach sleepers prefer. The immediate support helps keep the spine aligned without the sinking sensation associated with foam.

Airflow and breathability. The coil structure creates open space within the mattress, allowing air to circulate freely. This makes spring mattresses naturally cooler than traditional foam, particularly in warm climates — a meaningful advantage across most of Australia.

Edge support. Many spring mattresses include a reinforced perimeter using firmer foam borders or heavier edge coils. This provides a stable sitting surface at the edge of the bed and reduces the feeling of rolling off during sleep — a common complaint with softer foam-only designs.

Durability of spring systems. Spring mattresses typically last 5–8 years, according to the Sleep Foundation. The coil system itself is robust, but the comfort layers above it — usually foam or fibre — often compress before the springs wear out. When those layers go, the mattress loses comfort even if the springs remain functional.

Comfort & Feel: Side-by-Side Comparison

How a memory foam mattress feels. Memory foam has a distinctive "sinking in" sensation. When you lie down, the material slowly compresses and wraps around your body. Some sleepers love this cradled, cocooned feeling. Others find it makes changing position feel like an effort — especially if the foam is dense or slow to respond.

How spring mattresses feel. Spring mattresses have an immediate, responsive feel. They push back against you rather than absorbing your weight. This creates a more "on top of the bed" sensation rather than "inside it." For sleepers who move around a lot, repositioning is effortless.

Body contouring vs uniform support. Memory foam contours specifically to your shape, varying its response across different body zones. Spring mattresses provide a more uniform surface, with less variation between zones unless the mattress includes a foam or pillow-top comfort layer.

Adjustment period. New memory foam mattresses often need a break-in period. The foam softens and adapts to your body over time — this can take anywhere from a few nights to a few weeks. Spring mattresses generally feel consistent from the first night.

Partner impact. Memory foam significantly outperforms spring mattresses for motion isolation. Even pocket coil spring systems transfer more movement than a quality foam mattress. If either partner is a restless sleeper, this is one of the most important factors to weigh. For more on choosing by comfort needs, see our most comfortable mattress in Australia guide.

Support for Different Sleep Positions

Memory foam for side sleepers. Side sleeping creates concentrated pressure at the hips and shoulders. Memory foam excels here because it contours to these areas rather than resisting them. The result is less pressure and, for many people, fewer aches in the morning. A memory foam mattress is generally the default recommendation for dedicated side sleepers.

Spring mattresses for back and stomach sleepers. Back and stomach sleepers need a firmer, flatter surface to keep the spine in a neutral position. Spring mattresses provide consistent, firm support that prevents the hips from sinking — a common problem for stomach sleepers on softer foam. If back or stomach sleeping is your primary position, a medium-firm to firm spring mattress is worth considering.

Combination sleepers and hybrid considerations. If you shift between positions during the night, you need a mattress that responds quickly when you reposition. Traditional memory foam can feel sluggish for combination sleepers. A hybrid mattress — which pairs a foam comfort layer with a spring support core — offers a practical middle ground: pressure relief when stationary, responsive feel when moving. For more on this option, see our hybrid mattress explained guide.

Spinal alignment. Both mattress types can support good spinal alignment — what matters most is matching the firmness level to your body weight and sleep position. The key is finding a mattress that holds your spine in a natural curve throughout the night, without excessive sinking or rigid resistance.

Temperature & Cooling

Temperature regulation is one of the biggest differentiators between these two mattress types — and a critical consideration for Australian sleepers dealing with warm summers and year-round humidity in many regions.

Memory foam and heat retention. As noted above, the Sleep Foundation identifies heat retention as the main historical drawback of memory foam — the dense foam limits airflow, and the heat-activated response means warmth is drawn into the material. Hot sleepers on traditional foam often report waking up sweaty, especially in summer months.

Spring mattress breathability advantages. The coil structure of a spring mattress creates a natural ventilation channel. Air moves freely through the open spaces between coils, helping dissipate body heat overnight. This passive airflow is why spring mattresses have historically been considered the cooler option.

Cooling technologies in modern memory foam. The gap has narrowed considerably. Modern foam mattresses address heat retention through several approaches:

• Gel-infused foam — gel particles absorb excess heat and transfer it away from the body.

• Open-cell foam structures — allow air to circulate within the foam rather than trapping it. Koala's proprietary Kloudcell® is engineered around this principle.

• Cooling fabric covers — moisture-wicking materials draw heat and sweat away from the skin.

• Phase-change materials (PCM) — absorb heat when your body temperature rises and release it as you cool down, helping maintain a stable sleep temperature throughout the night. The Koala Polar+ uses cooling technology specifically engineered for hot sleepers in the AU climate.

These innovations have significantly reduced the performance gap. A well-engineered foam mattress with cooling technology can match — or outperform — a basic spring mattress for temperature regulation.

Seasonal considerations in Australia. Australian summers are demanding, and for sleepers in Queensland, Western Australia, or northern New South Wales, temperature management is a year-round concern. If you're a hot sleeper in a warm climate, built-in cooling technology should be a priority rather than a bonus feature. For more on bedroom environment and sleep, see our sleep hygiene guide.

Bedding choices to offset temperature issues. Your bedding can also offset temperature issues regardless of mattress type. Natural fibres — cotton, bamboo, and linen — allow better airflow than synthetic fabrics. A lightweight, seasonally appropriate duvet helps regulate temperature from above, no matter what lies beneath it.

Durability & Longevity

Memory foam lifespan. Memory foam mattresses typically last 7–10 years with proper care, per Sleep Foundation data. The foam gradually loses its ability to fully recover, developing permanent body impressions over time. Higher-density foams — generally 50 kg/m³ or above — resist this for longer. Rotating your mattress every 3–6 months can help slow uneven wear, though not all foam mattresses are designed to be rotated.

Spring mattress durability. Spring mattresses typically last 5–8 years. The coil system itself is often the last thing to fail; it's the comfort layers above that compress first. Once those layers go flat, you lose comfort and support even if the springs remain intact. Pocket coil systems tend to outperform older Bonnell or continuous coil designs.

Impact of body weight and usage. Both mattress types wear faster under heavier loads. For foam mattresses, higher body weight accelerates material compression. For spring mattresses, it strains both the coil system and the padding above. If you're a heavier sleeper, look for a higher-density foam or a spring mattress with a higher coil count and a robust comfort layer — and don't expect either type to reach the top end of its lifespan range.

For more detail on mattress replacement timelines and signs to watch for, see our how long does a mattress last guide.

Warranty and quality indicators. A strong warranty is a useful signal of build quality. Look for at least a 10-year warranty on a quality mattress — and read the fine print. Most warranties cover manufacturing defects and significant sagging (typically defined as indentations deeper than 2.5 cm), not normal softening over time. The Koala Plus — award-winning flippable firmness with two feels in one mattress — is one example of a foam mattress backed by a full 10-year warranty.

Price & Value Comparison

Typical Australian street prices vary widely by brand, construction quality, and inclusions. The ranges below are representative for the AU market at the time of writing.

Budget considerations for each type. Both types span a wide price range. At the entry level, spring mattresses tend to cost slightly less due to simpler manufacturing. At the premium end, advanced foam mattresses with cooling technology, multiple support zones, and quality cover fabrics can cost as much as — or more than — luxury spring and hybrid models.

Entry-level vs premium options. Entry-level foam and spring mattresses will give you the core feel of each type, but often skimp on durability or comfort layer quality. If you're buying for a guest room or a short-term rental property, entry-level options can be fine. For your primary bed, mid-range and above is generally worth the investment for longevity and sleep quality.

Cost per year of use. A practical way to compare value is annual cost. Divide the purchase price by the expected lifespan. A $1,200 foam mattress lasting 10 years costs roughly $120 per year. A $900 spring mattress lasting 7 years costs around $130 per year. The difference is modest — focus on sleep quality and comfort over pure price comparison.

Trial periods and financing. Most reputable Australian mattress brands now offer extended trial periods — typically 100 to 120 nights — so you can sleep on the mattress at home before committing. This is especially valuable with memory foam, which benefits from a break-in period. Flexible payment options (buy-now-pay-later and interest-free plans) are also widely available and make higher-quality mattresses more accessible. Koala offers a 120 day trial across the full mattress range, so you can find the right feel without financial risk.

Time for a new mattress?

If modern memory foam is the right fit, every Koala mattress is built around Kloudcell® open-cell foam — backed by our 120 day trial and 10-year warranty. 

Shop the Koala mattress range.