Firmness
Medium Firm
Type
Pocket Spring
Depth (cm)
26
Number of Layers
2
Trial Period (nights)
100
Warranty (years)
5
Price Range
£198 to £356
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.
This mattress suits you if you want straightforward pocket spring support without paying for extras you may never notice. The 800 Mirapocket springs are zoned, which means firmer support under heavier areas like your hips and gentler give elsewhere, so your spine stays better aligned whichever position you sleep in. The Eco Comfort Fibre layer is made partly from repurposed plastic and is highly breathable, which means air moves through the mattress rather than sitting against your body, a real help if you sleep warm. It's handcrafted in the UK, and Mattress Online backs it with a 100-night trial and a 5-year guarantee, on a product they've marked as discontinued, so check stock first.
Key Features & what's inside
- Eco Comfort Fibre. A comfort layer made from sustainable materials including repurposed plastic. It's highly breathable, which means air circulates freely through the mattress for a fresher, cooler feel through the night.
- Mirapocket Springs. 800 individual pocket springs, zoned to give targeted relief to your back, joints and hips. Because each spring moves independently, the mattress responds to your body shape and absorbs movement, so a restless partner is less likely to wake you.
Layer details from mattressonline.co.uk product page, September 2026.
Who's it NOT for?
If you love a soft, sink-in feel, this medium to firm mattress will likely feel too solid, and across owner reviews some found it firmer than expected. There's no memory foam layer, so you won't get that contouring hug. And since it's discontinued at Mattress Online, it's a poor choice if you might want a like-for-like replacement later.
Silentnight 800 Mirapocket Mattress
Across 738 verified owner reviews on the Mattress Online product page, it holds a 4.6 rating, with customers describing comfortable, supportive sleep and good material quality for the price. Firmness perception varies, though, with some finding it firmer than anticipated.
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How firm is the Silentnight 800 Mirapocket mattress?
It's described as medium to firm, so it offers a supportive feel with a little surface comfort from the Eco Comfort Fibre layer. Some owners report it feels firmer than they expected, so lightweight side sleepers in particular may find it a touch too solid.
Does the Silentnight 800 Mirapocket come with a trial?
Mattress Online lists a 100-night trial with this mattress. That trial is the retailer's own offer rather than a Silentnight guarantee, so if you buy elsewhere, check that seller's returns terms before ordering.
How many springs does the Silentnight 800 Mirapocket have?
It contains 800 individual Mirapocket springs. They're zoned, which means the support varies across the mattress to relieve pressure at key points like your back, hips and joints, and each spring moves independently to limit disturbance from a partner.
Is the Silentnight 800 Mirapocket good for hot sleepers?
It should cope well. The Eco Comfort Fibre top layer is highly breathable and there's no dense foam to trap warmth, so air circulates through the mattress rather than building up heat around you.
Has the Silentnight 800 Mirapocket been discontinued?
Mattress Online marks it as discontinued and asks buyers to call to arrange an order. Stock may still be available, but it's sensible to confirm availability in your size before setting your heart on it.
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