Otty and Simba are two of the UK's best-known hybrids, and they are built very differently. Otty uses full-height pocket springs under memory foam; Simba uses a layer of mini pocket springs over foam. Here is how their mainstream hybrids compare on springs, foam, feel, trial and guarantee, with a third option from REM-Fit set out on the same terms.
Last updated: August 2026. Specifications checked against each brand's own product pages.
Quick answer: Otty Original Hybrid is best for sleepers who want the firmest feel of the three (Otty rates it 7 out of 10) on up to 2,000 full-height 16 cm pocket springs, and are happy with a 100-night trial. Simba Hybrid is best for anyone who prefers a medium-firm, bouncier surface from 25 mm mini pocket springs over foam, with a 200-night trial and next-day delivery. The REM-Fit 3000 Supreme is the third option: a medium 25 cm hybrid built on 3000 tall premium pocket springs in two layers, topped with open-cell memory foam that lets air move through it rather than trapping heat, with a 100-night trial (200 with a protector) and a 15-year guarantee.
Otty vs Simba vs REM-Fit: the full spec sheet
Each brand's mainstream hybrid, UK sizes, from the specifications each brand publishes. Where a brand does not publish a figure, the cell says so rather than guessing.
| Feature | OttyOriginal Hybrid | SimbaHybrid | REM-Fit3000 Supreme |
|---|---|---|---|
| Mattress type | Hybrid, memory foam over a single layer of full-height pocket springs | Hybrid, mini pocket springs over foam | Hybrid, open-cell memory foam over tall pocket springs |
| Springs | Up to 2,000 encapsulated pocket springs, 16 cm tall, in one layer | Up to 1,900 mini pocket springs, 25 mm tall (king) | 3000 tall premium pocket springs in two layers, running the full depth of the mattress Most springs |
| Foam type and depth | Memory foam described as heat-regulating, over a firm support foam and a base foam; single depths not published | Foam with graphite added, a core foam and a zoned foam base; single depths not published | 5 cm zoned open-cell memory foam, made with an open cell structure so air passes through the foam |
| Firmness (out of 10) | Medium-firm, 7 out of 10 (Otty's own scale) | Medium-firm, not rated out of 10 | Medium, 6 out of 10, rated for sleepers up to 20 stone |
| Height | 25 cm | 25 cm | 25 cm |
| Sleep trial | 100 nights | 200 nights | 100 nights, 200 with a protector |
| Guarantee | 10 years | 10 years | 15 years Longest |
| Delivery | 2 to 4 working days mainland UK, up to 10 to Scotland; old mattress removal for a fee | Free next-day (UK mainland, order by 1pm) | Free, 2 to 5 days; old mattress removal available at checkout |
| Key award | Named best hybrid by The Guardian and firmest bed by The Telegraph (per Otty) | Good Housekeeping Approved 2026 | Good Housekeeping Winner 2026 (Pocket 1000) and Approved 2026 (5000 Lux Elite), same range |
| Foam certification | Not stated on product page | CertiPUR | CertiPUR |
Spring counts are measured differently. Otty's are full-height 16 cm pocket springs in a single layer, and are the fairest like-for-like with REM-Fit's. Simba's are 25 mm mini springs near the surface, so its support underneath comes from foam. REM-Fit counts tall pocket springs across two layers, which is where the 3000 comes from. Compare the construction, not just the number.
Who should buy Otty?
Buy the Otty Original Hybrid if you want the firmest of the three and real full-height springs under you. Otty rates it 7 out of 10, and The Telegraph called it the firmest bed you can buy.
The build is a knitted cover over a memory foam layer Otty describes as heat-regulating, a firm support foam, then a single layer of up to 2,000 encapsulated 16 cm pocket springs with reinforced sides and a base foam, all 25 cm deep. The full-height springs are the reason it feels supportive rather than sunk-in, and The Guardian named it the best hybrid you can buy.
The trade-offs are the trial and the delivery. Otty gives 100 nights against Simba's 200, delivery takes 2 to 4 working days on the mainland and up to 10 to Scotland with old-mattress removal charged extra, and the firm feel can be too much for lighter side sleepers. The guarantee is 10 years.
Who should buy Simba?
Buy the Simba Hybrid if you prefer a medium-firm, bouncier surface, want the mattress tomorrow, and would rather have 200 nights to decide. It is the softer of the two rivals and the only one with free next-day delivery as standard.
Simba's construction is a layer of mini pocket springs, up to 1,900 in a king size and 25 mm tall, sitting near the surface over a foam layer with graphite added, a core foam and a zoned foam base. The mini springs give a responsive feel that sleepers who dislike sinking into foam prefer, and the graphite is there to draw a little heat away from the body.
The trade-off is that 25 mm mini springs are a comfort layer, not a support core, so the support underneath still comes from foam, and the medium-firm feel can be too firm for lighter side sleepers. It carries a 200-night trial, a 10-year guarantee and Good Housekeeping Approved status for 2026.
How Otty, Simba and REM-Fit compare on what matters
Springs and support
Otty and REM-Fit both use full-height pocket springs, which is the construction that holds a spine level for years. Otty has up to 2,000 in one 16 cm layer; REM-Fit's 3000 Supreme has 3000 tall premium pocket springs in two layers running the full depth of the mattress, each moving independently under the part of the body above it. Simba's 25 mm mini springs sit over foam.
Comfort layer
REM-Fit publishes a 5 cm zoned open-cell memory foam layer, softer under the shoulders and firmer under the hips. Otty and Simba each use memory or graphite foam layers but do not publish a single comfort-layer depth.
Feel
Otty is the firmest at 7 out of 10, Simba is medium-firm, and the REM-Fit 3000 Supreme is a true medium at 6 out of 10, which makes it the pick for side sleepers of the three. Feel is personal, which is why each brand offers a home trial.
Cooling
Otty describes its memory foam as heat-regulating and Simba adds graphite to standard foam. REM-Fit changes the foam itself: its open-cell memory foam has an open structure that lets air move through the layer, so body heat is carried away rather than held against you, and the tall spring core beneath is mostly air, so the whole mattress breathes. In REM-Fit's own customer data, 84% of shoppers want temperature regulation, which is why every model is built this way.
Trial and guarantee
Otty gives 100 nights and 10 years; Simba 200 nights and 10 years. REM-Fit gives 100 nights (200 when a protector is bought with the mattress) and 15 years.
Awards
Otty cites The Guardian and The Telegraph, Simba Hybrid is Good Housekeeping Approved 2026, and REM-Fit's Pocket 1000 is a Good Housekeeping Winner 2026 with the 5000 Lux Elite Approved.
Where REM-Fit fits
The REM-Fit 3000 Supreme is the like-for-like against both: a medium hybrid, 25 cm deep, built on 3000 tall premium pocket springs in two layers, with a 5 cm zoned open-cell memory foam layer on top and encapsulated edges so the whole surface is usable. Like Otty, it puts real full-height springs under you; unlike either, it uses two layers of them, which adds stability and a more progressive feel as you settle in, and it publishes both the spring count and the comfort-layer depth for every size.
The open-cell memory foam is the part that answers the biggest complaint about memory foam. Traditional memory foam has a closed cell structure that traps body heat; REM-Fit's foam is made with open cells that let air pass through the layer, so heat and moisture move away from you through the night while the foam still cushions the hips and shoulders. It sits at 6 out of 10 on REM-Fit's firmness scale and is rated for sleepers up to 20 stone.
If Otty's firmness is the draw, the 4000 Ortho Elite (firm, 9 out of 10, 4000 tall pocket springs in two layers) goes further among REM-Fit's hybrid mattresses, and the 5000 Lux Elite (medium-firm, 7.5 out of 10, Good Housekeeping Approved 2026) sits between Otty and Simba on feel with the highest spring count in the range. Every REM-Fit mattress uses the same tall pocket spring and open-cell foam construction, and comes with a 15-year guarantee and free UK delivery in 2 to 5 days.
REM-Fit 3000 Supreme Hybrid Mattress
Medium feel, 3000 tall premium pocket springs, breathable open-cell memory foam and a 15-year guarantee.
Shop the 3000 Supreme✓ 100-night trial (200 with a protector)✓ 15-year guarantee✓ Free UK delivery✓ 0% finance
Otty vs Simba vs REM-Fit: which is better value?
Value here is what you get for the years you own the mattress, not the ticket price on the day. On that measure the differences are the guarantee, the trial, the delivery and what each brand tells you about the build.
Otty and Simba both cover you for 10 years; Otty gives 100 nights to decide and Simba 200. REM-Fit covers the mattress for 15 years, and its trial is 100 nights as standard or 200 with the protector most people buy anyway. Simba and REM-Fit deliver free; Otty charges for old-mattress removal and takes longer to reach Scotland.
REM-Fit and Otty both publish a full spring count, which makes them the two you can compare on paper; only REM-Fit also publishes the comfort-layer depth. All three collect free if you return within the trial, so the remaining difference is feel, and that is what the trial is for.
100-Night Trial
200 nights when you add a mattress protector. Free collection if it is not right.
Free UK Delivery
Delivered in 2 to 5 days. Old mattress removal available at checkout.
15-Year Guarantee
Five years longer than Otty or Simba.
Otty vs Simba FAQs
Last updated: August 2026
Is Otty or Simba better?
Neither is better outright. Otty Original Hybrid is firmer (7 out of 10) on up to 2,000 full-height 16 cm pocket springs with a 100-night trial; Simba Hybrid is medium-firm on 25 mm mini springs over foam with a 200-night trial and next-day delivery. Both carry a 10-year guarantee.
Which is firmer, Otty or Simba?
Otty. Otty rates the Original Hybrid 7 out of 10 and The Telegraph called it the firmest bed you can buy, while Simba describes its Hybrid as medium-firm. The REM-Fit 3000 Supreme is softer than both at a medium 6 out of 10, on tall pocket springs.
Which has more pocket springs, Otty or Simba?
Otty publishes up to 2,000 full-height 16 cm pocket springs; Simba publishes up to 1,900 mini springs 25 mm tall in a king size, so Otty has more real springs. REM-Fit's 3000 Supreme has 3000 tall pocket springs in two layers running the full depth of the mattress.
Are Otty mattresses any good?
Otty's Original Hybrid is a well-built firm hybrid on full-height pocket springs, and The Guardian named it the best hybrid you can buy. Its limits are the 100-night trial, paid old-mattress removal and a firmness that lighter side sleepers may find too much.
Are Simba mattresses the best?
Simba Hybrid is Good Housekeeping Approved 2026 and gives the longest trial of the three at 200 nights, but its springs are 25 mm mini springs over a foam base rather than a full-height support core. Whether it is best for you depends on whether you want that bouncy, medium-firm feel.
Do Otty and Simba do a sleep trial?
Yes. Otty offers 100 nights and Simba 200 nights, both with free collection if you return the mattress. REM-Fit offers 100 nights as standard, extended to 200 nights when a mattress protector is bought with the mattress.
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