Firmness
Type
Open Coil Spring
Depth (cm)
25
Number of Layers
5
Trial Period (nights)
Warranty (years)
5
Price Range
£154 to £155
Best Sleeping Position(s)
Certifications
Assessed from the specification published by Archers Sleepcentre, captured September 2026, and from regular price comparison across our UK retail partners.
The main draw here is fit: EU Single sizing is hard to find, and this gives you that extra length without a special-order price. The Medium to Firm feel suits back and stomach sleepers who want a supportive, traditional sprung surface rather than the sink of memory foam. Tencel in the sleep surface helps with heat flow, so warmer sleepers should find it a touch more breathable than a basic quilted mattress. A wire edge border stiffens the perimeter, which means you can sit on the edge or spread out without the sides collapsing early. At £154 to £155 it's honest value, provided you accept open coil rather than pocket springs.
Key Features & what's inside
- Stretch Knit Fabric. A soft, pliable cover that lets the fillings beneath contour to your body shape. It flexes rather than pulling taut, so you feel more of the comfort layers.
- Quilted Finish with White Fibre Fillings. The outer fabric is stitched to the surface fillings, giving a flat, even sleeping surface. The white fibre fillings are lightweight and high loft, hypoallergenic, and hold their shape well over time.
- Tencel. Eucalyptus treated fibres that improve heat flow and move moisture away from you. In practice, this helps keep the sleep surface drier and cooler through the night.
- Open Coil Springs. An interconnected system of hourglass shaped springs set in rows from head to toe, joined by spiral wires. It's a durable, traditional construction, though movement transfers across the bed more than it would with pocket springs.
- Wire Edge Border. A thick rod-edge wire attached to the perimeter rows of springs. This resists border breakdown and gives usable support right to the edge of the mattress.
Layer details from archerssleepcentre.co.uk product page, September 2026.
Who's it NOT for?
If you share a bed, the size rules it out, and open coil springs transfer movement, so restless sleepers may notice partner disturbance on larger models of this type. Lightweight side sleepers could find Medium to Firm a little unforgiving. And if you want deep pressure relief, look at pocket sprung or foam hybrids instead.
Highgrove Solar Supreme Extra Long Mattress
Across the 73 verified reviews on the Archers Sleep Centre product page, where it scores 4.9 out of 5, buyers praise comfort, quality and value for money, with delivery speed often mentioned as a plus. A few note the firmness differed from what they expected, so treat the Medium to Firm label as a guide rather than a promise.
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How firm is the Highgrove Solar Supreme Extra Long mattress?
It's described as Medium to Firm, which suits most back and stomach sleepers. Some owners in the reviews on Archers Sleep Centre note the firmness varied from their expectations, so if you're a lightweight side sleeper it may feel slightly firmer than you'd like.
What size is the Highgrove Solar Supreme Extra Long?
It's available in EU Single only, which is longer than a standard UK single. That makes it a good fit for European bed frames or taller sleepers, but check your frame's dimensions before ordering, as it won't sit properly in a standard UK single bedstead.
Does the Highgrove Solar Supreme come with a guarantee?
Archers Sleep Centre's listing states a 5 year warranty, made up of a 1 year guarantee plus a 4 year manufacturing warranty. These are terms shown on that retailer's page rather than a brand-wide promise, so confirm cover with whichever retailer you buy from.
Is the Highgrove Solar Supreme good for hot sleepers?
It should help. The mattress includes Tencel, eucalyptus treated fibres that improve heat flow and moisture dissipation, and the open coil interior allows air to move more freely than solid foam. It won't feel actively cool, but warm sleepers should find it reasonably breathable.
How much does the Highgrove Solar Supreme Extra Long cost?
It's priced from £154.77, with the range running £154 to £155. That's budget territory, and the trade-off is a traditional open coil construction rather than pocket springs. Note it's listed as made to order, so allow for that when planning delivery.
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