Silentnight Miracoil Sleep Mattress

Assessed from the specification published by Mattress Man, captured September 2026, and from regular price comparison across our UK retail partners.

This is a sensible choice if you want a straightforward, supportive mattress from a familiar name without spending a fortune. The medium firm feel gives decent spinal support, which most back and front sleepers will appreciate, although lightweight side sleepers may find it a little too firm at the shoulder and hip. It holds a 4.7 rating from 417 reviews on mattressman.co.uk, which is a reassuring sign of owner satisfaction. Mattressman lists a 60-night trial and free next day delivery, though those are that retailer's own terms rather than Silentnight's, so check what applies if you buy elsewhere.

Budget buyers
It is described as one of the more affordable routes into a well-known British brand, so you get a familiar name without spending a fortune.

Back sleepers
The medium firm feel gives decent spinal support, which means most people who sleep on their back should find it comfortable and supportive.

Front sleepers
A medium firm feel keeps the body supported and level rather than sinking in, which most front sleepers will appreciate.

Couples
Sizes run from a UK Single up to a Super King, so partners can pick a width that gives both of them room.

Lightweight side sleepers may find the medium firm feel too unyielding around the shoulders and hips. It's also a poor fit for buyers who like to compare specifications closely, since depth, materials and spring details aren't published on the listing. If you prefer the contouring hug of memory foam, look elsewhere.

How firm is the Silentnight Miracoil Sleep Mattress?

It's listed as medium firm, which means a supportive feel with less sink than a softer mattress. That tends to suit back and front sleepers, while lighter side sleepers may find it slightly too firm for comfortable pressure relief at the shoulder.

What sizes does the Silentnight Miracoil Sleep Mattress come in?

It's available in UK Single, Small Double, Double, King and Super King.

Does the Silentnight Miracoil Sleep Mattress come with a trial?

Mattressman lists a 60-night trial with this mattress. That's the retailer's own offer rather than a Silentnight guarantee, so if you buy from a different shop, check their returns terms before ordering.

How quickly is the Silentnight Miracoil Sleep Mattress delivered?

Mattressman offers free next day delivery on this mattress, with handling of 0 to 1 days and transit of 1 to 3 days. Delivery terms are the retailer's, so timings may differ if you buy from another shop.

What springs are in the Silentnight Miracoil Sleep Mattress?

It uses Silentnight's Miracoil spring system, a continuous coil design intended to spread support across the mattress. The listing doesn't state a spring count or the materials in the comfort layers, so ask the retailer if you need those specifics.