Silentnight Amsterdam Miracoil Ortho Double Mattress
The Silentnight Amsterdam Miracoil Ortho is an orthopaedic mattress described on its Mattress Online listing as extra firm, so treat this as a properly solid feel rather than a middling firm.
- Properly firm, zoned support
- Fibres & cover help you sleep cool
- Made without chemical treatments
£214
Get the lowest price we've found
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
Silentnight Amsterdam Miracoil Ortho Mattress
More available sizes
Last seen for £534 at Mattress Online on 2nd September 2026
Mattress details
Mattress
Silentnight Amsterdam Miracoil Ortho Mattress
Size
Firmness
Firm
Construction
Orthopaedic
Open Coil Spring
Eco-Friendly
Depth (cm)
24
Layers
3
Layer Details
Damask cover
A finely woven, durable fabric that feels soft to the touch, which means the firmness underneath isn't harsh against your skin. It doesn't retain heat, so it helps keep the surface cool.
Eco Comfort Fibre
A layer of fibres made from recycled materials that gives cushioning comfort over the springs. It also helps evaporate body heat, which means a cooler night if you tend to run warm.
Miracoil Springs
Silentnight's own open coil system with separate support zones that support the spine and distribute your weight evenly. In practice, that means firmer support where you're heaviest and less pressure on hips and shoulders.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- A shared width that fits most rooms: At 135cm wide, the UK double leaves floor space in a typical UK bedroom for a wardrobe and drawers, which a UK king often doesn't.
- Zoned support at couples' width: Miracoil's separate support zones firm up under each sleeper's heavier areas, so two different body weights sharing 135cm each get support where they carry it.
- Room for bedside tables on both sides: Allow at least 2.6m x 2.8m and most couples can still fit a table each, which sizing up to a UK king can rule out.
- Cool surface for two: Two bodies raise the temperature under one duvet, and the Eco Comfort Fibre layer helps evaporate that heat rather than trap it.
- Bedding is cheap and everywhere: Double sheets and duvets are stocked at every price point, useful if you're kitting out a guest room or a first home.
This size suits you if...
You share the bed every night, you both prefer a firm, supportive feel, and your bedroom sits around the 2.6m x 2.8m we suggest as a minimum. It also makes sense for a guest room that hosts visiting couples, since the UK double is the size most people expect when two guests share. Solo sleepers who like to spread out, or who share with a pet, get generous space here too.
Consider another size if...
You and your partner both want real stretching room, or one of you is tall: 67.5cm each is workable rather than roomy. We'd recommend the UK king instead, 15cm wider and 10cm longer, allowing at least 2.7m x 2.9m of room.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's
Is the Silentnight Amsterdam UK double big enough for two adults?
It works for most couples, with the usual caveat: 135cm across gives 67.5cm each for two people sharing, roughly a single-bed feel per person. The Miracoil springs' zoned design supports two different body weights well, but if either of you sprawls or wakes when the other moves, the extra width of the UK king is a sensible upgrade.
What are the dimensions of the Silentnight Amsterdam in a UK double?
It measures 135 x 190cm, which is 4ft 6in x 6ft 3in. That's the standard UK double footprint, so it fits any UK double bed frame or divan base, and standard double sheets and a 200 x 200cm double duvet will dress it without any hunting for unusual sizes.
Will the Silentnight Amsterdam double fit a room with bedside tables on both sides?
Usually, yes, and that's one of the UK double's strengths. We suggest a minimum room of 2.6m x 2.8m, with around 3m x 3m comfortable. Within that, most couples can keep a table on each side and still open wardrobe doors, whereas a UK king in the same room often forces you to give one up.
How much bigger is the UK king than this double?
The UK king is 15cm wider and 10cm longer than the UK double, taking you from 135 x 190cm to 150 x 200cm. That extra width is shared between you, and the added length matters if either of you is tall. Allow at least 2.7m x 2.9m of room for the UK king before committing.
Is the Silentnight Amsterdam double a good choice for a guest room?
It's a reasonable fit, with one condition. The UK double is what visiting couples expect, and the hypoallergenic, chemical-free build suits a bed different people use. The extra firm feel divides opinion, though, and across owner reviews some people felt springs near the edges, so occasional guests will cope better than a lightweight side sleeper staying for weeks.