Last seen for £544.69 at Archers Sleepcentre on 2nd November 2026
Rest Assured Cardigan Natural Pocket 1400 King Size Mattress
The Rest Assured Cardigan Natural Pocket 1400 is a pocket sprung mattress available in UK Single, Double, King and Super King.
- Extra-firm feel for back sleepers
- Natural wool, cashmere & silk fillings
- Hand-tufted finish for lasting shape
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
More available sizes
Last seen for £544.69 at Archers Sleepcentre on 2nd November 2026
Last seen for £467.09 at Archers Sleepcentre on 2nd November 2026
Last seen for £630.88 at Archers Sleepcentre on 2nd November 2026
Last seen for £357.04 at Archers Sleepcentre on 2nd November 2026
Mattress details
Mattress
Rest Assured Cardigan Natural Pocket 1400 Mattress
Size
Firmness
Extra Firm
Construction
Pocket Spring
Depth (cm)
Layers
Layer Details
Key benefits
- More space each: At 75cm per person, a UK king gives each of you 7.5cm more than a UK double, which means a little more distance when your partner turns over.
- Room to stretch out: The 200cm length adds 10cm over a UK double, so anyone approaching 6ft can lie out straight without their feet reaching the end.
- Easier on split schedules: If one of you gets up hours earlier, the extra width gives the partner still asleep slightly more distance from the person climbing out.
- Space for a pregnancy pillow: Through pregnancy and the months after, 75cm each leaves room for a support pillow on your side without pushing your partner towards the edge.
- Fits more bedrooms than a super king: We suggest at least 2.7m x 2.9m for the UK king, against 3m x 2.9m for the UK super king, so more rooms can take it.
This size suits you if...
You share the bed every night and have started to feel cramped on a UK double, or one of you is approaching 6ft and would welcome the extra 10cm of length the UK king adds.
Consider another size if...
Your bedroom falls under our suggested minimum of 2.7m x 2.9m once fitted wardrobes are in. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m.
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FAQ's
Is the Cardigan Natural Pocket 1400 UK king long enough for a tall partner?
It measures 200cm, which is 6ft 6in and 10cm longer than the UK double. That gives anyone approaching 6ft room to lie out straight. The UK super king is the same length, so sizing up from the UK king adds width but no extra length.
Will a UK king Cardigan Natural Pocket 1400 fit a new build master bedroom?
New build bedrooms often feel smaller once wardrobes go in, so measure the clear floor space. We suggest at least 2.7m x 2.9m for the UK king, with 3.2m x 3.2m comfortable. If you fall short, the UK double needs at least 2.6m x 2.8m.
Does a UK king help if my partner and I sleep at different times?
It gives you 75cm each, 7.5cm more than a UK double, so there is a little more distance between you when one person gets up. Rest Assured doesn't give enough detail on this mattress for us to say how much movement crosses the surface, so count on the extra width as the main gain.
Is a UK king big enough for two people and a dog?
At 75cm each, a UK king leaves only a modest amount of spare room once a dog settles between you. If the dog is on the bed every night, the UK super king gives 90cm each, 15cm more than the UK king, though we suggest at least 3m x 2.9m for it.
Is the Cardigan Natural Pocket 1400 in a UK king a good size during pregnancy?
Yes, for most couples. Your 75cm leaves space for a wedge or full body pillow while your partner keeps their side. If you use a long pillow that spreads across the bed, the UK super king gives 90cm each, but it needs a larger room.