Firmness
Medium Firm
Type
Hybrid
Depth (cm)
28
Number of Layers
4
Trial Period (nights)
100
Warranty (years)
5
Price Range
£1,269
Best Sleeping Position(s)
Certifications
Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
Latex is the draw here. It adapts to your body shape without the sink-in feel of memory foam, which means you can change position easily through the night. Beneath it sits a layer of Sealy Firm and Extra Firm foam, then PostureTech springs with varied tension for support and pressure relief. The quilted cover has a ProShield® treatment that fights allergens, and the mattress is Allergy UK approved, useful if dust mites are a concern. Mattress Online, currently the sole listed retailer, offers a 100-night trial (a mattress protector purchase from them is required) and free delivery to most locations, with next-day weekday delivery available. Old mattress removal costs £35.00 extra.
Key Features & what's inside
- Quilted cover. A soft, cosy quilted cover with ProShield® treatment, which fights against allergens. That makes it a sensible pick if you're prone to reacting to dust mites.
- Latex comfort layer. A plush, adaptive material that responds to your body shape for individualised comfort. In practice this means pressure relief with a springy, easy-to-move-on feel rather than a slow sink.
- Foam layer. An additional layer of Sealy Firm and Extra Firm foam. This sits between the latex and the springs, adding a firmer transitional feel beneath the softer surface.
- PostureTech Core Support Springs. A spring design using unique shapes and varied tension to provide full-body support and pressure relief. EdgeGuard technology firms up the perimeter, which means less roll-off feeling when you sleep near the edge.
Layer details from mattressonline.co.uk product page, September 2026.
Who's it NOT for?
If you're a lightweight side sleeper, or you have hip or shoulder sensitivity, the medium to firm feel may prove a little unforgiving. It's also only available in UK Super King, so it's a non-starter for smaller beds, and at £1,269 it won't suit tighter budgets.
Sealy Advantage Austen Latex Mattress
View all mattresses
How firm is the Sealy Advantage Austen latex mattress?
Sealy describes it as medium to firm. That should suit most back and stomach sleepers, although lightweight side sleepers may find it a little too firm for comfortable pressure relief at the hips and shoulders.
Does the Sealy Advantage Austen come with a sleep trial?
Mattress Online, the listed retailer, offers a 100-night trial, but it requires you to buy a mattress protector from them at the same time. This is the retailer's own offer, so terms may differ if you buy elsewhere.
What guarantee does the Sealy Advantage Austen have?
The mattressonline.co.uk listing states a 5-year guarantee. As this appears on a retailer page rather than Sealy's own site, it's sensible to confirm the guarantee terms with whichever retailer you buy from.
How deep is the Sealy Advantage Austen mattress?
It's 28cm deep, a fairly substantial build. Worth checking your fitted sheets accommodate that depth, as some standard sheets can struggle beyond about the mid-twenties in centimetres.
Is the Sealy Advantage Austen good for allergy sufferers?
It's a reasonable choice. The mattress is approved by Allergy UK, and the quilted cover carries a ProShield® treatment that fights against allergens. Latex itself is a resilient material, though if you have a latex sensitivity you should take advice before buying.
Couldn't find an answer to your question? Send us a message