Emma Diamond Spring Free Deluxe Mattress
The Emma Diamond Spring Free Deluxe is a hybrid mattress with a medium soft feel, which means it offers a gentler, more cushioned surface than most hybrids, something side sleepers in particular tend to appreciate.
- Medium-soft feel for side sleepers
- Deep, generously built design
- Fits most UK bed frames
£849
Get the lowest price we've found
At 29cm deep, the Emma Diamond Spring Free Deluxe is a substantial mattress that should sit well on most bed frames and work with standard deep-fitted sheets. It comes in UK Single, Double, King and Super King. Full construction details for this specific model are limited, so if you like to know exactly what's inside before buying, it's worth checking with the retailer directly.
Mattress specifications
Firmness
Medium Soft
Type
Hybrid
Depth (cm)
29
Number of Layers
4
Trial Period (nights)
Warranty (years)
Price Range
£849 to £1,199
Best Sleeping Position(s)
Side Sleeping
Certifications
Assessed from Emma's product page, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
If you sleep on your side, or you simply prefer sinking into your mattress rather than lying on top of it, the medium soft feel here is the main draw. Softer hybrids are a little harder to find than medium or medium firm ones, so this fills a genuine gap. The 29cm depth suggests a generously built mattress, and the four sizes on offer cover most UK bed frames. It sits at the pricier end for many budgets, though deep hybrid mattresses do tend to cost more than simpler foam designs.
Key features & layer details
PolarLuxe cover
A polyester-based cover (80% polyester, 19% polyethylene, 1% elastane) that Emma describes as instantly cooling and refreshing, so the surface should feel cool when you lie down. It's removable and washable up to 40°C, and it's hypoallergenic.
Diamond Cool foam layer
A visco-elastic foam with graphite particles that Emma says moves excess heat away from your body. That should help you stay more comfortable if you tend to sleep warm.
HRXComfort foam layer
A medium soft foam that lets you settle into the mattress without sinking down too far. It gives the cushioned feel that side sleepers tend to like.
HRXSupport foam layer
A precision-engineered foam base that Emma guarantees will keep its shape for 10 years. It gives the softer layers above a steady foundation, and because this mattress has no pocket springs, the support comes from foam alone.
Layer details from emma-sleep.co.uk and furniturevillage.co.uk product pages, October 2026.
Best suited for?
Side sleepers
The medium soft feel lets you sink in rather than lie on top, which suits side sleepers who like a softer, more cushioned surface.
Couples
Available in Double, King and Super King, this mattress gives couples room to choose a size that fits most UK bed frames comfortably.
Lighter sleepers
A medium soft feel is easier to sink into for those with a lighter frame, so the surface should feel cushioned rather than firm.
Guest rooms
With four sizes from Single to Super King and a soft feel that most people find easy to settle into, it suits a spare room.
A medium soft mattress is unlikely to suit dedicated front sleepers or heavier bodies, who generally need firmer support to keep the spine aligned. If you like a solid, supportive surface with minimal sink, this probably isn't the one for you. Budget shoppers may be put off by the starting price.
Save on an earlier or ex-display model
Some retailers still sell the earlier version of this mattress, or ex-display and returned stock at a lower price. These are the sizes where it costs less than the current model's best price.
Emma Diamond Spring Free Deluxe Mattress
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FAQ's
How firm is the Emma Diamond Spring Free Deluxe mattress?
It's listed as medium soft, which means a gentler, more forgiving feel than the medium or medium firm rating most mattresses carry. That tends to suit side sleepers and lighter bodies best, as it allows the shoulders and hips to sink in slightly. Front sleepers and heavier people usually do better with something firmer.
How deep is the Emma Diamond Spring Free Deluxe mattress?
It measures 29cm deep, which is a generous depth for a hybrid mattress. Just check your fitted sheets before it arrives, as some standard sheets struggle with mattresses this deep and you may need deep-fitted ones.
What sizes does the Emma Diamond Spring Free Deluxe come in?
Four UK sizes are available: Single, Double, King and Super King. There's no small double or European sizing listed, so if you need either of those you'll want to look elsewhere.
How much does the Emma Diamond Spring Free Deluxe cost?
It depends on the size you choose, and the price table on this page shows the current price for each size. It sits at the premium end of the market, which is fairly common for deep hybrid designs.
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