Pocket Spring vs Bonnell Mattresses: A Sydney Buyer's Guide to Support, Firmness and Value
A mattress is the one piece of furniture you use for roughly a third of your life, yet it is often chosen in a rush. Walk into any Sydney showroom and the first question is usually about spring systems: pocket spring or bonnell? This guide explains the difference in plain terms so you can match a mattress to your body, your partner and your budget.
How the two spring systems work
Spring mattresses have used steel coils for well over a century. According to the Wikipedia overview of mattress construction, the oldest coil type is the Bonnell, an hourglass-shaped coil, while pocketed (Marshall-style) coils are individually wrapped in fabric.
- Bonnell spring: coils are linked together into one connected grid. The result is a firm, bouncy, supportive surface that is typically the more affordable option.
- Pocket spring: each coil sits in its own fabric pocket and moves independently. The mattress contours to your body and reduces motion transfer, so you are less likely to feel a partner rolling over.
Which suits you?
Choose pocket spring if you share a bed with someone of a different weight, if you wake to partner movement, or if you want pressure relief at the shoulders and hips. Choose bonnell if you like a firm, springy feel, need a sensible mattress for a guest room or kids' room, or are working to a tighter budget.
Neither is automatically better. A well-made bonnell in a spare room will outlast a poorly made pocket spring that is slept on nightly.
Firmness by sleeping position
- Side sleepers: a medium to plush surface lets the shoulder and hip sink in while keeping the spine level.
- Back sleepers: medium to medium-firm supports the natural curve of the lower back.
- Stomach sleepers: firmer is generally better, so the hips do not sink and arch the back.
- Couples: test the mattress together, lying in your normal positions for several minutes rather than a quick sit.
Heavier sleepers usually feel a given mattress as softer than lighter sleepers do, so firmness labels are a guide, not a guarantee.
Get the size right first
Australian mattresses follow standard dimensions. As listed on Wikipedia's bed size reference, these are approximately:
- Single: 92 x 188 cm
- King Single: 107 x 203 cm
- Double: 138 x 188 cm
- Queen: 153 x 203 cm
- King: 183 x 203 cm
Brands vary by a centimetre or two, so always check the exact measurements on the product. Leave at least 60 cm of walkway on each side of the bed, and measure the bed frame, not just the mattress, because a bed with a thick headboard or storage base takes more floor space. Our queen bed and king bed ranges list frame dimensions so you can plan the room before you visit.
Details that signal quality
- Coil count and gauge: more coils in a pocket mattress generally means finer contouring, but the quality of the steel and the comfort layers matter as much as the headline number.
- Comfort layers: foam, fibre or latex on top of the springs decide how plush or firm the surface feels on day one and how well it holds shape later.
- Edge support: reinforced edges stop the mattress sagging when you sit on the side and give you more usable sleeping width.
- Breathability: Sydney summers are humid. Look for ventilated or cooling fabrics, and avoid heavy dense foams if you sleep hot.
- Warranty: read what counts as a defect, how much body impression is covered, and whether the base you use must meet any requirements.
Pair the mattress with the right base
A great mattress on a weak base wears out early. Slatted bases need slats spaced closely enough for the mattress warranty, and a solid platform base suits pocket spring mattresses well. If you are buying a full set, browse our bedroom furniture range, where beds, bedside tables and tallboys can be matched in one visit, so the frame, mattress and storage work together.
When to replace a mattress
Most spring mattresses are worth reviewing after seven to ten years. Replace sooner if you notice visible sagging or body impressions, wake with stiffness that eases through the day, or feel springs through the top layers. Rotating the mattress end to end every few months, where the manufacturer recommends it, helps wear more evenly.
See and test before you buy
Comfort is personal, and no description replaces lying down. Browse our mattress collection online, then test them in person at our Lidcombe showroom or our Marsden Park store, which suits shoppers across Sydney's north-west. Bring your partner, wear comfortable clothes, and spend a few minutes in your usual sleeping position on each shortlisted mattress. A little time in-store now is the cheapest way to avoid a decade of poor sleep.
