Relyon Tonedale 4500 Natural Heritage Mattress
Mattress
Relyon Tonedale 4500 Natural Heritage Mattress
Size
Firmness
Medium
Construction
Depth (cm)
37
Layers
2
Layer Details
- Pillow Top. A plump pillow top of sustainably sourced British wool, which means a soft, cushioned surface that also helps regulate temperature naturally. Wool wicks moisture away, so it stays fresher through the night than many synthetic fillings.
- Pocket Springs. Up to 4,500 springs, each housed in its own fabric pocket so they compress independently. In practice that means support tailored to where your body needs it, with pressure relief at the shoulders and hips.
Layer details from mattressnextday.co.uk product page, September 2026.
- Distance from a fidgety partner: With 90cm each, you have 15cm more each than on the UK king, so a partner who turns all night is simply further away from you.
- Space when the household piles in: When a small child wanders in after a bad dream, a UK super king usually leaves both adults a usable strip of mattress rather than a sliver along the edge.
- Room for a large dog as a routine: If your dog sleeps on the bed every night rather than now and then, the extra width stops that from being a nightly negotiation over who gets the middle.
- Independent springs across a wide surface: Up to 4,500 individually pocketed springs move on their own, which means someone shifting on one side of this 180cm width should barely register on the other.
- Proportions that suit a big room: In a large master bedroom or a high-ceilinged period property, a 37cm deep UK super king looks settled in the space, where a UK king can look slightly lost.
This size suits you if...
You share the bed with a partner whose tossing and turning keeps waking you, or your children or a large dog regularly end up in bed with you, and your bedroom comfortably clears our suggested minimum of 3m x 2.9m.
Consider another size if...
Your bedroom is under 3m x 2.9m, or you sleep alone and rarely share. We'd recommend the UK king instead, for which we suggest at least 2.7m x 2.9m.
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Relyon Tonedale 4500 UK super king or UK king: which should I buy?
The UK super king is 30cm wider than the UK king and the same length, giving 15cm more each for two sharing. Choose the UK super king if disturbance or extra bodies in the bed are the problem. If your room is tighter, the UK king needs at least 2.7m x 2.9m against 3m x 2.9m for the UK super king.
Is a UK super king Relyon Tonedale big enough for two adults and a child?
For occasional night-time visits, usually yes. Two adults get 90cm each on paper, and a small child tends to fit in the gap without anyone ending up on the edge. If a child sleeps with you every night into their later years, the bed will feel fuller, although you will still have far more room than on a UK double.
Will I feel my partner moving on the Relyon Tonedale 4500 super king?
Much less than on a narrower size. The pocket springs work independently on every size of this mattress, but the UK super king adds physical distance. You get 22.5cm more each than on the UK double, and for a genuinely restless partner that distance often matters more than any comfort layer.
Can a Relyon Tonedale UK super king go in a loft conversion bedroom?
Only if the floor space with full standing height is large enough. We suggest at least 3m x 2.9m, and in a loft the sloping ceiling usually decides which wall the headboard goes against. At 37cm deep, this mattress sits high, so check you can sit up in bed without meeting the slope.
Is the UK super king Tonedale 4500 a good size if my dog sleeps on the bed?
If it is a large dog and it sleeps with you every night, the UK super king is the size most likely to keep everyone comfortable. The UK king gives 75cm each for two people before the dog arrives, while the UK super king gives 90cm each, which leaves real room for a stretched-out dog.