Foam and pocket springs suit different sleepers, so we compare the Ergoflex 5G Mattress and the Sleepeezee Deluxe 1000 Pocket Mattress as worked examples of each construction.
You are choosing between two constructions here rather than two products, so it helps to treat these mattresses as worked examples. Foam mattresses like the Ergoflex 5G contour slowly, sinking you gently into the surface. Pocket sprung mattresses like the Sleepeezee Deluxe 1000 push back, giving you a springier, more on-top-of-the-bed feel.
Both are honest examples of their type. The Ergoflex builds its case on a deep 9cm layer of HD visco-elastic memory foam within a five-layer, 23cm design. The Sleepeezee takes the traditional route: 1000 individually pocketed springs under soft fibre layers, 25cm deep and firm. On this pairing, the spring example wins. The Sleepeezee's deeper build and considerably lower price for a pocket sprung design carry the comparison.
That said, a win on the page is a win on averages. If your body strongly prefers the cradle of foam, the sections below explain when to go against the verdict.
Our verdict at a glance: which mattress wins?
The Sleepeezee wins because it pairs a deeper 25cm pocket sprung build with a price well below the norm for its construction, where the Ergoflex costs well above the norm for foam.
WINNER
You want deep pressure relief
The Ergoflex's 9cm layer of HD visco-elastic memory foam moulds slowly to your shape, which means less pressure on hips and shoulders, a genuine help for side sleepers.
You worry foam will sleep warm
Ergoflex places a 5cm Cool-Sleep airflow layer directly beneath the memory foam and tops the mattress with a TENCEL cover, both there to move heat away from your body.
You value independent endorsement
It holds a Which? Best Buy award for 2024 to 2026, which offers reassurance beyond the brand's own claims.
RUNNER UP
You prefer a firm, responsive feel
The Deluxe 1000's rating is Firm, and its 1000 pocket springs react individually to your body, giving support that follows your shape without the slow sink of foam.
You want strong value from pocket springs
It sits well below the typical price for its construction type, so you get a 25cm pocket sprung mattress from an established British brand without stretching the budget.
You like reassurance on standards
Sleepeezee is a National Bed Federation Approved Brand and the mattress conforms to BS7177: 2008 fire resistance standards for home use.
Ergoflex 5G
Sleepeezee Deluxe 1000
Firmness
Firm
Layers
5
3
Trial (nights)
30
100
Guarantee (years)
10
10
Price Range
£424 to £764
£298 to £558
On construction, the spring example takes it. The Sleepeezee is 25cm deep with 1000 individually pocketed springs, a slightly taller build than the Ergoflex's 23cm. The Ergoflex answers with a more sophisticated layer design, five layers against three, which is where foam earns its keep. If depth and a responsive core matter most to you, the pocket sprung route wins here.
Construction verdict: which wins on build?
On construction, the spring example takes it. The Sleepeezee is 25cm deep with 1000 individually pocketed springs, a slightly taller build than the Ergoflex's 23cm. The Ergoflex answers with a more sophisticated layer design, five layers against three, which is where foam earns its keep. If depth and a responsive core matter most to you, the pocket sprung route wins here.
Which mattress feels better?
<p>Ergoflex doesn't publish a firmness rating for the 5G, which is a little frustrating if you have a firm preference either way, though its 30-night trial lets you judge the feel at home. What you can rely on is the character of the material: 9cm of memory foam gives a cradling, pressure-relieving surface that tends to suit side sleepers and anyone with sore hips or shoulders.</p><p>The Sleepeezee is rated Firm, with soft white fibre layers softening the surface over that firm sprung core. That combination suits back and front sleepers who want to stay supported rather than sink in. Lighter side sleepers may find a firm pocket sprung feel presses a little hard on the shoulders, and that is where foam holds the advantage.</p>
Other important factors to consider before buying.
Beyond feel, the practical terms differ between these two examples. The Ergoflex comes with a 30-night manufacturer trial, while the Sleepeezee's trial varies by retailer, so check before you buy. Both carry a 10-year guarantee, which puts the long-term cover on equal footing.
Ergoflex 5G
Sleepeezee Deluxe 1000
Trial (nights)
30
100
Guarantee (years)
10
10
Do bear in mind that as these mattresses come delivered in sealed boxes they will have a rubbery smell when first extracted. They need a good few hours in a room with the windows open before you sleep on them.
Environmental impact and sustainability
Ergoflex 5G
Sleepeezee Deluxe 1000
Certifications
BS 7177
The Sleepeezee comes in noticeably cheaper, and sits well below the typical price for a pocket sprung mattress, where the Ergoflex sits some way above the going rate for memory foam. Live prices for both are in the tables below.
Ergoflex 5G Mattress
Sleepeezee Deluxe 1000 Pocket Mattress
The spring side wins this pairing, with the Sleepeezee Deluxe 1000 as its example. Two dimensions decided it. On construction, the Sleepeezee offers a deeper 25cm build with 1000 individually pocketed springs that respond to you one by one. On value, it undercuts the typical price for its own construction type by a wide margin, where the Ergoflex 5G sits well above the going rate for memory foam. The Ergoflex takes the layers dimension, with a thoughtful five-layer design built around 9cm of pressure-relieving memory foam, and it remains the better pick for lightweight side sleepers who want a cradling feel. For most buyers weighing these two constructions, though, the firm pocket sprung option delivers more mattress for less money.
Decision helper
Consider your primary need: the slow, pressure-relieving cradle of memory foam versus the firm, responsive support of pocket springs at a friendlier price.
WINNER
You want deep pressure relief
The Ergoflex's 9cm layer of HD visco-elastic memory foam moulds slowly to your shape, which means less pressure on hips and shoulders, a genuine help for side sleepers.
You worry foam will sleep warm
Ergoflex places a 5cm Cool-Sleep airflow layer directly beneath the memory foam and tops the mattress with a TENCEL cover, both there to move heat away from your body.
You value independent endorsement
It holds a Which? Best Buy award for 2024 to 2026, which offers reassurance beyond the brand's own claims.
RUNNER UP
You prefer a firm, responsive feel
The Deluxe 1000's rating is Firm, and its 1000 pocket springs react individually to your body, giving support that follows your shape without the slow sink of foam.
You want strong value from pocket springs
It sits well below the typical price for its construction type, so you get a 25cm pocket sprung mattress from an established British brand without stretching the budget.
You like reassurance on standards
Sleepeezee is a National Bed Federation Approved Brand and the mattress conforms to BS7177: 2008 fire resistance standards for home use.
Is a foam or pocket sprung mattress better for side sleepers?
Foam usually suits side sleepers better because it cushions pressure points. The Ergoflex 5G's 9cm memory foam layer moulds to hips and shoulders, easing pressure where you need it. A firm pocket sprung mattress like the Sleepeezee Deluxe 1000 may press a little hard on lighter side sleepers, though back and front sleepers often prefer that firmer push-back.
Do memory foam mattresses sleep hotter than spring mattresses?
Memory foam has a reputation for holding warmth, but both constructions can address it. The Ergoflex 5G uses a 5cm Cool-Sleep airflow layer and a TENCEL cover to move heat away, while the Sleepeezee's knitted cover is designed for airflow and breathability. On this pairing the cooling contest was too close to call.
Are pocket sprung mattresses cheaper than memory foam?
Not always, but in this pairing the spring example is the clear value pick. The Sleepeezee Deluxe 1000 sits well below the typical price for a pocket sprung mattress, while the Ergoflex 5G costs noticeably more than the norm for memory foam. Always compare against similar mattresses of the same construction, as each type has its own price range.
What does pocket sprung actually mean?
Pocket sprung means each spring sits in its own fabric pocket and moves independently, so the mattress responds to your body rather than rocking as one unit. The Sleepeezee Deluxe 1000 has 1000 of these springs, which also means less partner disturbance. Foam mattresses like the Ergoflex 5G achieve a similar effect through the material itself moulding to you.
How long do foam and spring mattresses last?
Both examples here carry a 10-year guarantee, so the long-term cover is identical. Lifespan depends more on quality than construction type. The Ergoflex 5G pairs its guarantee with a 30-night manufacturer trial, while the Sleepeezee Deluxe 1000's trial varies by retailer, so check the terms with your stockist before ordering either.
Author
Jo Plumridge
Author