Choosing between a firm and a medium-firm mattress, with the Sleepeezee Deluxe 1000 Pocket Mattress and the Simba Hybrid Mattress as your two worked examples.
You are really choosing between two firmness levels here rather than two products, so it helps to treat these mattresses as worked examples. Firm mattresses, like the Sleepeezee Deluxe 1000, push back and hold you on the surface. Medium-firm designs, like the Simba Hybrid, give a little more at the shoulders and hips before the support kicks in, which suits a wider range of sleepers and positions.
Comparing these two examples on construction, sleeper suitability and terms, the medium-firm Simba Hybrid comes out the winner. Its five layers, including 1,900 Aerocoil microsprings and a nine-zoned base, deliver a more adaptable feel than the three-layer, fibre-over-spring build of the Sleepeezee.
That said, the Sleepeezee is the clear value pick. It sits well below the typical price for a pocket sprung mattress, so if a firm feel is what your back wants and budget matters, it remains a sensible buy.
Our verdict at a glance: which mattress wins?
The Simba Hybrid's five-layer, medium-firm construction with zoned support adapts to more sleepers than the Sleepeezee's simpler firm build.
RUNNER UP
You want a genuinely firm surface
The Deluxe 1000 is rated firm, with soft white fibres layered over the sprung core to soften the surface without losing that solid feel underneath. Back sleepers who like to sit on top of a mattress rather than sink in tend to prefer this.
Value is your priority
It comes in well under the going rate for a pocket sprung mattress, which makes it an affordable route into a firm, 1000-spring design from an established British brand.
You like traditional pocket springs
Each of the 1000 springs sits in its own fabric pocket and reacts independently, which means support that follows your shape and less disturbance from a partner.
WINNER
Medium-firm suits more sleeping positions
The Simba's medium-firm feel allows shoulders and hips to settle in slightly, and its nine-zoned foam base firms up where wider, heavier areas need it, a more forgiving arrangement for side sleepers in particular.
A more sophisticated construction
Five layers and 1,900 Aerocoil microsprings against three layers and 1000 springs. The microsprings compress individually, which means movement stays on one side of the bed.
Longer to decide
Simba offers a 200-night trial on every size, useful because owners commonly report it feels firmer than expected in the first few weeks.
Sleepeezee Deluxe 1000
Simba Hybrid
Firmness
Firm
Medium Firm
Layers
3
5
Price Range
£308 to £564
£524 to £825
Construction goes to the medium-firm hybrid approach, illustrated here by the Simba. Both mattresses are 25cm deep, but the Simba layers graphite-infused Simbatex foam over 1,900 microsprings and a nine-zoned base, where the Sleepeezee pairs 1000 pocket springs with synthetic fibre comfort layers. The Sleepeezee's simpler build is part of why it costs less, but the Simba's extra layers do more work adapting to your body.
Construction verdict: which wins on build?
Construction goes to the medium-firm hybrid approach, illustrated here by the Simba. Both mattresses are 25cm deep, but the Simba layers graphite-infused Simbatex foam over 1,900 microsprings and a nine-zoned base, where the Sleepeezee pairs 1000 pocket springs with synthetic fibre comfort layers. The Sleepeezee's simpler build is part of why it costs less, but the Simba's extra layers do more work adapting to your body.
How firm are both mattresses?
Which mattress feels better?
The Sleepeezee Deluxe 1000 is firm, which suits back sleepers and anyone who wants to feel held on top of the mattress rather than cradled by it. The trade-off: lightweight side sleepers may find it puts a little too much pressure on shoulders and hips, and across verified owner reviews firmness perception varies, with some calling it too soft and others too firm. The Simba Hybrid is medium-firm, a middle ground that works for most side and back sleepers, helped by the zoned base that supports hips and shoulders differently. It has its own exceptions. Tom's Guide found it less suited to committed front sleepers, and lighter sleepers may find it a touch firm at first.
Other important factors to consider before buying.
Firmness is the headline difference, but trial and guarantee terms deserve a look before you commit, especially given how much firmness perception varies between owners. Both examples carry a 10-year guarantee. The trials differ more than you might expect.
Sleepeezee Deluxe 1000
Simba Hybrid
Trial (nights)
100
200
Guarantee (years)
10
10
Environmental impact and sustainability
Sleepeezee Deluxe 1000
Simba Hybrid
Sustainability
Undefined
Undefined
Certifications
BS 7177
CertiPUR
Prices and sizes for both mattresses
The Sleepeezee sits well below the typical price for a pocket sprung mattress, while the Simba costs noticeably more than the average hybrid. Current prices for both are in the tables below.
Sleepeezee Deluxe 1000 Pocket Mattress
Simba Hybrid Mattress
The medium-firm hybrid wins this comparison, with the Simba Hybrid as its example. Construction decided it: five layers, 1,900 individually compressing Aerocoil microsprings, graphite-infused foam and a nine-zoned base give a more adaptable feel than the Sleepeezee's three-layer, fibre-over-spring build, and the medium-firm rating suits a wider range of sleepers and positions. Terms help too, since Simba's 200-night trial applies to every size, while the Sleepeezee's trial varies by retailer. The Sleepeezee takes value convincingly, sitting well below the typical pocket sprung price, and it remains the right call for back sleepers who want a properly firm surface on a budget. For most people, though, the forgiving medium-firm feel is the safer bet, and the long trial covers you if it isn't.
Decision helper
Consider your primary need: a firm, affordable surface for back sleeping versus an adaptable medium-firm feel that suits more positions.
RUNNER UP
You want a genuinely firm surface
The Deluxe 1000 is rated firm, with soft white fibres layered over the sprung core to soften the surface without losing that solid feel underneath. Back sleepers who like to sit on top of a mattress rather than sink in tend to prefer this.
Value is your priority
It comes in well under the going rate for a pocket sprung mattress, which makes it an affordable route into a firm, 1000-spring design from an established British brand.
You like traditional pocket springs
Each of the 1000 springs sits in its own fabric pocket and reacts independently, which means support that follows your shape and less disturbance from a partner.
WINNER
Medium-firm suits more sleeping positions
The Simba's medium-firm feel allows shoulders and hips to settle in slightly, and its nine-zoned foam base firms up where wider, heavier areas need it, a more forgiving arrangement for side sleepers in particular.
A more sophisticated construction
Five layers and 1,900 Aerocoil microsprings against three layers and 1000 springs. The microsprings compress individually, which means movement stays on one side of the bed.
Longer to decide
Simba offers a 200-night trial on every size, useful because owners commonly report it feels firmer than expected in the first few weeks.
Is a firm or medium-firm mattress better for side sleepers?
Medium-firm is generally the safer choice for side sleeping. The Simba Hybrid's medium-firm feel and nine-zoned base let shoulders and hips settle in with support underneath, while a firm mattress like the Sleepeezee Deluxe 1000 may put a little too much pressure on those points, particularly for lighter sleepers.
Who should choose a firm mattress over a medium-firm one?
Back sleepers and anyone who prefers to lie on top of a mattress rather than sink in tend to suit firm best. The Sleepeezee Deluxe 1000 fits that brief, with soft fibre layers softening the surface over a firm sprung core. Side sleepers and lighter people usually do better on medium-firm options like the Simba.
Do firm mattresses last longer than medium-firm ones?
Not necessarily, and these two examples show it: both carry a 10-year guarantee. Longevity depends more on build quality than firmness. The Sleepeezee uses 1000 pocket springs under fibre layers, while the Simba backs its foam and 1,900 microsprings with a stabilising core, so either should hold up if looked after.
Can a medium-firm mattress still support a bad back?
Yes, provided the support underneath is sound. The Simba Hybrid pairs its medium-firm surface with a zoned CertiPUR foam base that firms up under hips and shoulders, and owners praise its back support. Equally, across verified owner reviews of the firm Sleepeezee, many report eased back pain, so both approaches can work.
Which is better value, a firm pocket sprung mattress or a medium-firm hybrid?
On value alone, the firm pocket sprung route wins here. The Sleepeezee Deluxe 1000 sits well below the typical price for its construction type, while the Simba Hybrid costs more than the average hybrid. You are paying the Simba premium for extra layers, zoning and a 200-night trial, which admittedly buys real benefits.
Editor
Jo Plumridge
Consumer journalist, 20 years. Writes on sleep and home for The Telegraph, TechRadar and Expert Reviews.