Harrison Spinks Fitzgerald Super King Mattress
The Harrison Spinks Fitzgerald is a firm, natural-fibre mattress with 11,000 springs across six layers, which means support that adapts closely to your body rather than pushing back in one flat plane.
- Firm support that eases shoulders & hips
- Breathes well for cooler nights
- Traceable wool, farm-grown hemp & flax
£3,699
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Harrison Spinks Fitzgerald Mattress
More available sizes
Mattress details
Mattress
Harrison Spinks Fitzgerald Mattress
Size
Firmness
Firm
Construction
Pocket Spring
Wool
Natural
Depth (cm)
35
Layers
3
Layer Details
Pillow top surface
A deeply filled pillow top with micro springs and natural fillings, which means a softer, cloud-like feel at the surface before you reach the firmer support below. This takes the edge off the firm rating for the first few centimetres.
Natural fillings
Fully traceable British wool and cotton, plus hemp and flax sourced straight from the Harrison Spinks farm. Natural fibres like these help the mattress breathe, which means a cooler night if you tend to overheat.
Pocket springs
11,000 responsive springs in dynamic layers of high-density micro, Posturfil and Cortec™ pocket springs. Six layers adapt to your body as you sleep, relieving pressure while letting air move through the mattress.
Layer details from featherandblack.com product page, September 2026.
Key benefits
- 90cm each for two sharing: Two people get 90cm each, which means a partner who fidgets or runs hot is simply further away when it matters.
- Room for night-time visitors: When a small child pads in at 3am, this width absorbs the extra body without either adult ending up on the edge.
- 11,000 springs across the full width: Six layers of pocket springs support each sleeper independently, so movement on one side of a 180cm surface barely reaches the other.
- Firm support that suits big rooms: In a large master or period bedroom a smaller mattress can look lost, and the Fitzgerald's 35cm depth gives the super king real presence.
- Natural fillings, cooler sharing: Wool, cotton, hemp and flax breathe well, which helps when two adults plus occasional company are all generating heat under one duvet.
This size suits you if...
You share the bed every night and want the most distance a standard UK size allows, your partner is genuinely restless and you've decided space is the fix rather than another comfort layer, or children and a large dog regularly join you and a UK king has started to feel crowded. You'll also need a bedroom of at least 3m x 2.9m, ideally more.
Consider another size if...
Your bedroom falls short of our suggested 3m x 2.9m minimum, or you mostly sleep alone. We'd recommend the UK king instead: it's 30cm narrower, the same length, and we suggest at least 2.7m x 2.9m for it.
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FAQ's
How big is the Harrison Spinks Fitzgerald in a UK super king?
It measures 180 x 200cm, which is 6ft x 6ft 6in. That's 30cm wider than the UK king at the same length, and it's the largest size the Fitzgerald comes in as standard. At 35cm deep, it's a substantial piece of furniture, so measure your space carefully before ordering.
What room size do I need for the Fitzgerald super king?
We suggest a minimum of 3m x 2.9m, with around 3.5m x 3.2m feeling more comfortable if you want bedside tables on both sides and space to walk around. In a loft conversion, check the ceiling slope too: a mattress this wide limits which wall the bed can sit against.
How much space do two people get on the super king Fitzgerald?
90cm each for two people sharing, the same width each sleeper would have on a UK single. Combined with the Fitzgerald's six layers of pocket springs, which respond to each body separately, that distance means one person turning over rarely disturbs the other.
Should I get the Fitzgerald in a UK king or super king?
If your room allows it and you share the bed, the UK super king is the better long-term choice: 30cm of extra width makes a real difference with a restless partner or visiting children. If your bedroom is under 3m x 2.9m, the UK king suits you better, and we suggest at least 2.7m x 2.9m for that size.
Can one person rotate the Fitzgerald super king?
Realistically, no. It's a no-turn design, so you never need to flip it, but Harrison Spinks does recommend rotating it head to foot occasionally. At 180cm wide, 35cm deep and densely filled with springs and natural fibres, that's a two-person job. Plan on having help every few months.