Otty Extra Firm Hybrid Single Mattress
The Otty Extra Firm Hybrid is a 25cm deep, double-sided mattress built for people who want serious support.
- Flippable, with two firmness levels
- Holds your spine level, no hammocking
- 100-night trial & 10-year guarantee
£469.99
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Otty Extra Firm Hybrid Mattress
More available sizes
Mattress details
Mattress
Otty Extra Firm Hybrid Mattress
Size
Firmness
Extra Firm
Construction
Foam
Pocket Spring
Hybrid
Memory Foam
Depth (cm)
25
Layers
6
Layer Details
Double Sided Cover
A washable, double-sided cover in a thick 400g knit, which means a soft, plush feel against your skin. Being removable makes it far easier to keep clean over the years.
FlexFoam Layer
A high density, durable FlexFoam layer that delivers the firm support level. This is what gives the mattress its solid, planted feel rather than a soft initial sink.
Firm Encapsulated Pocket Springs
Large encapsulated pocket springs provide the firm rating, and because each spring moves independently, motion transfer is kept to a minimum. That means less disturbance when a partner turns over.
Side Supports
Thick foam borders around the perimeter give you an edge-to-edge sleep surface and help prevent rolling out of bed. Useful if you sit on the edge to get dressed.
High Density Support Foam
A layer of specially designed Reflex Foam sits above the springs to add comfort and extra support when the mattress is flipped to the firm side. It keeps that side supportive rather than punishing.
Bamboo & Charcoal Memory Foam
Bamboo and charcoal infused memory foam adds a touch of contouring comfort when the mattress is on the firm side. The infusion is there for its health benefits as well as feel.
Layer details from otty.com product page, September 2026.
Key benefits
- Fits where space is tight: At 90 x 190cm, this size leaves floor clear in a loft conversion or box room where anything wider would dominate.
- Easier to flip than the bigger sizes: This mattress is double-sided, and in a UK single one person can realistically turn it to swap between the 9/10 and 10/10 firmness levels.
- Edge support matters more at 3ft: Thick foam side supports keep the full 90cm usable, so a narrower sleep surface doesn't feel narrower still at the edges.
- A guest bed with proper support: For a spare room that doubles as an office, it gives occasional guests firm, level support rather than a soft mattress that sags between visits.
- Cheap, easy bedding: Standard single sheets and a 135 x 200cm single duvet fit, and both are the most widely stocked bedding of any UK size.
This size suits you if...
You're a single adult or older teen who prefers a properly firm feel, your room is compact and a 90cm width is all the space you can spare, or you're setting up a spare room and want a supportive guest bed rather than a soft one. Back and front sleepers get the most from this firmness, so it suits solo sleepers in that camp best.
Consider another size if...
You're buying for a lighter-built side sleeper, or for two people. A 9/10 firmness will press hard on a lightweight child's shoulders and hips, and for couples we'd recommend the UK double or UK king of this same mattress instead.
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FAQ's
Will the Otty Extra Firm Hybrid UK single fit a bunk bed?
The footprint is standard at 90 x 190cm, so it matches most UK bunk and mid-sleeper frames. The catch is depth: at 25cm it is deeper than many bunk-safe mattresses, so measure your guard rail first. Safety guidance generally requires the rail to sit well above the mattress surface, and 25cm eats into that clearance.
How big is the Otty Extra Firm Hybrid in a UK single?
It measures 90 x 190cm, or 3ft x 6ft 3in, the standard UK one-person size. That means any standard single frame, single fitted sheets and a single duvet will fit without hunting for special sizes. Depth is 25cm, which suits most frames but is deep for some raised or cabin beds.
What room size do I need for a UK single mattress?
We suggest allowing at least 2.1m x 2.8m of floor space. That gives you room to walk alongside the bed and open a wardrobe or desk drawer. In a child's or teen's room competing with storage and a desk, the 90cm width of a UK single is what keeps the layout workable.
Is the Otty Extra Firm Hybrid UK single a good choice for a child?
It depends on their build and sleep position. This mattress is rated 9/10 on its softer side, which is firmer than most children need, and lightweight side sleepers will likely find it too hard on shoulders and hips. For a heavier teen who sleeps on their back or front, the support is a genuine plus.
Where can I buy the Otty Extra Firm Hybrid in a UK single?
Availability shifts, so the most reliable answer is the live comparison table on this page, where prices are updated as retailers change them. The UK single is typically the least expensive size of this mattress, though we'd still compare before buying rather than assuming the brand's own site is cheapest.