Silentnight 800 Mirapocket Mattress

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.

Warm sleepers
The highly breathable Eco Comfort Fibre layer and lack of a foam-heavy build let air move through the mattress, so you are less likely to overheat.

Couples
Each of the 800 pocket springs moves independently and absorbs movement, which means a restless partner is less likely to wake you.

Allergy sufferers
A hypoallergenic build means this mattress suits anyone who wants to keep irritants down, without paying extra for specialist features.

Eco-conscious buyers
The comfort layer uses repurposed plastic, it is vegan-friendly, and the brand is B-Corp certified, so the credentials are easy to point to.

Budget buyers
Sitting at the affordable end of the pocket spring market, it gives you zoned spring support without paying for extras you may never notice.

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.

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.