Firmness
Extra Firm
Type
Open Coil Spring
Depth (cm)
22
Number of Layers
3
Trial Period (nights)
100
Warranty (years)
5
Price Range
£237 to £457
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.
Extra firm mattresses are a niche, and this one serves it honestly. The Miracoil spring system uses zoned support, which means firmer resistance where your body is heaviest, so heavier sleepers and back sleepers get proper spinal alignment rather than the sag a soft mattress can allow. The Eco Comfort Fibre layer adds breathable comfort from recycled, sustainable sources, and the mattress is hypoallergenic, vegan-friendly and handcrafted in the UK. Prices run from £237 to £457 depending on size, with five sizes from UK Single to UK Super King. Yes, the feel is unapologetically hard, but that firmness is precisely why owners with aches and pains rate it. It comes with a 5 year guarantee.
Key Features & what's inside
- Damask cover. A finely woven, durable fabric that feels soft against the skin, which means a pleasant surface without the heat retention some covers suffer from. It's built for long-lasting performance too.
- Eco Comfort Fibre. Fibres made from recycled materials and 100% sustainable sources, offering breathable, fresh comfort. This is the layer that softens the very top of an otherwise rigid mattress, though only slightly.
- Miracoil Springs. Silentnight's own open coil spring system, arranged into separate support zones. In practice this means your weight is distributed evenly and your spine gets consistent support across the whole surface.
Layer details from mattressonline.co.uk product page, September 2026.
Who's it NOT for?
Side sleepers, especially lighter ones, will likely find the extra firm surface too hard on shoulders and hips. Anyone wanting a plush, sink-in feel should look elsewhere, and at 22cm deep it's shallower than some may expect. It's also an open coil design, so couples may notice more movement transfer than with pocket springs.
Silentnight Ortho Dream Star Miracoil Mattress
Across 5,056 reviews on mattressonline.co.uk, the mattress holds a 4.5 rating, with owners reporting comfortable, supportive sleep and a reduction in aches and pains. Reviewers particularly recommend it for back issues or for anyone who prefers a rigid sleeping surface.
View all mattresses
How firm is the Silentnight Ortho Dream Star mattress?
It's rated Extra Firm, the hardest end of the scale. The Miracoil zoned springs give a rigid, supportive feel with only a slight softening from the Eco Comfort Fibre layer on top. It suits back sleepers and those who want firm support, but lighter side sleepers may find it uncomfortable.
Does the Silentnight Ortho Dream Star 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 check the terms wherever you buy, as they may differ between shops.
What is the Silentnight Ortho Dream Star made of?
Three layers: a damask cover that stays cool to the touch, Eco Comfort Fibre made from recycled materials and 100% sustainable sources, and Miracoil springs, Silentnight's zoned open coil system. It's hypoallergenic, vegan-friendly and handcrafted in the UK.
How deep is the Silentnight Ortho Dream Star mattress?
The dimensions table lists it at 22cm deep for all sizes, though the listing page quotes slightly different figures in places. That's shallower than many modern mattresses, so deep fitted sheets aren't necessary.
What guarantee does the Silentnight Ortho Dream Star have?
It comes with a 5 year guarantee, as listed on the mattressonline.co.uk retailer page. That covers manufacturing faults rather than normal wear, so keep your proof of purchase.
Couldn't find an answer to your question? Send us a message