Pocket Sprung Mattress Explained
Published 2026-08-03. Last updated 2026-08-28. Desk research by Kaiser Khan — we have not product-tested pocket sprung mattress. This is not a shop review and not medical advice.
In short
A pocket sprung mattress uses steel coils, each in its own fabric pocket, so neighbouring springs move more independently than in open-coil units. Spring count is the number of pockets in a stated size, not a quality score alone. Wire gauge, coil geometry, zoning and comfort layers also determine support and feel.
- How it works
- One coil, one pocket
- Spring count
- Count ÷ size
- Typical lifespan band
- 7–10 years
- Slat gap check
- Often ≤7 cm
Neighbours move more independently than open coil.
1000 in a Single is denser than 1000 in a Super King.
Educational range. Not a warranty promise.
Hybrids with thick foam often need a tighter slat gap.
About 4 minutes to read
What materials go into this mattress?
Typical builds use steel coil springs, non-woven or woven spring pockets, comfort foams or natural fillings, cover fabric. Exact stacks vary by model. Read the spec, not the shop slogan.
- steel coil springs
- non-woven or woven spring pockets
- comfort foams or natural fillings
- cover fabric
How long does this mattress typically last?
A typical range is 7– 10 years. Body weight, base support and rotation change that. It is not a warranty promise.
7– 10 years
What is a pocket sprung mattress?
A pocket sprung mattress uses steel coils, each sewn or welded into its own fabric bag. One coil can compress without dragging every neighbour with it. That is the difference from an open coil / Bonnell unit, where wire links the coils into one grid.
The sleep feel still comes mostly from the layers above the pockets — wool, other fibres, latex or foam. The spring unit is the support engine. The top is the cushion.
How do pocket springs differ from open coils?
In a pocket unit, load stays more local. In an open-coil lattice, load travels across the linked wires. That is why pocket units usually mould in a smaller patch and transfer less partner movement.
Open coil is not “wrong”. It is a different mechanism, often cheaper to make, and it can feel springier as a whole bed. If partner movement bothers you, pocket or foam-heavy hybrids are the usual next question, not a higher open-coil count.
Is spring count a quality score?
No. Spring count is the number of pocketed coils in a stated mattress size. One thousand springs in a UK Single is a denser pack than one thousand in a UK Super King. Always read count with size. Ask for springs per square metre when you compare different sizes.
Higher counts often use smaller-diameter coils packed more tightly. Some builds add a micro-coil layer above the main unit. That can change surface feel. It does not automatically mean thicker wire or a longer life.
Inspect wire gauge, coil shape, zoning, and comfort layers. A lower count with better materials can outlast a high count with thin padding. See how spring count is marketed and spring count explained.
Better-quality pocket units historically used calico or cotton pockets and hand-nested assemblies. Many modern units use non-woven pockets glued in rows. Process differences change airflow and side-to-side response. Neither sentence is a ranking.
What sits above the spring unit?
Wool, cotton, other fibres, latex, polyfoam or memory foam. Those layers decide plushness, temperature feel and how much you notice the coils. A hybrid mattress is a pocket core plus a substantial foam or latex comfort stack.
Zoning means some rows of pockets are firmer — often under the lumbar band. Zoning is a layout, not a medical treatment. See zoned support.
Edges may use denser pockets, foam rails or foam encapsulation. Sitting on the edge is a different load from sleeping in the middle. See edge support.
What base should a pocket sprung mattress sit on?
Pocket sprung mattresses are commonly used on divan bases and slatted bases. For foam-heavy hybrids on slats, check the maker’s maximum slat gap (often around 7 cm) so the comfort layers cannot hammock between laths. The warranty leaflet wins over a website rule of thumb.
A sprung-edge divan adds another spring system under the mattress. That changes edge feel. It is not required for a pocket mattress to “work”.
Do pocket springs stop roll-together?
They reduce the linked-grid effect that encourages roll-together on open-coil beds. Couples can still share centre sink if the comfort layers are very soft. Independent pockets are not a guarantee of a dead-still surface.
If two body weights are far apart, zip-and-link or different tensions matter more than a bigger count. See couples and zip-and-link.
How long does a pocket sprung mattress last?
A typical educational range is about 7–10 years. Body weight, rotation, base support and filling quality change that. It is not a warranty promise. No-turn designs still need rotation — see why no-turn mattresses and turning vs rotating.
Related BedGuide entries
How it works
Frequently asked questions
What does spring count mean on a pocket sprung mattress?
Spring count is the number of pocketed coils in a stated mattress size. Density matters more than the raw number. One thousand springs in a UK Single is denser than one thousand in a UK Super King. Compare springs per square metre when sizes differ.
Are pocket sprung mattresses better for couples than open coil?
Pocket sprung units typically transfer less motion than Bonnell open-coil grids because coils are not linked into one wire network. Thick comfort layers can still couple some movement across the surface. Independence is relative, not absolute.
How is a higher spring count usually achieved?
Higher counts often use smaller-diameter coils packed more densely. Some builds stack micro-coils above a main pocket unit. Count alone does not prove better durability. Wire gauge, tempering and comfort fillings still govern long-term support.
Do pocket sprung mattresses need a special base?
They are commonly used on divans and slatted frames. Check the maker’s maximum slat gap, especially on hybrids with thick foam above the pockets. A gap that is too wide can let comfort layers hammock.