Silentnight Rio Miracoil Cushion Top Double Mattress
The Silentnight Rio Miracoil Cushion Top is a soft mattress with a cushioned sleep surface, listed as an eco-friendly design.
- Soft feel suits side sleepers
- Cushion top eases pressure points
- An eco-friendly choice
£297
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Silentnight Rio Miracoil Cushion Top Mattress
More available sizes
Last seen for £509 at Mattress Online on 25th June 2026
Mattress details
Mattress
Silentnight Rio Miracoil Cushion Top Mattress
Size
Firmness
Soft
Construction
Open Coil Spring
Eco-Friendly
Depth (cm)
Layers
3
Layer Details
Cushion top
A layer of soft white fibres sits at the surface to give a cushioned feel. It adds a little give under your shoulders and hips, so the mattress feels gentler than a bare spring top.
Dense polyester fibre layer
Below the cushion top is a dense layer of polyester fibres. It adds to the firm comfort and freshness, which means the surface doesn't feel too sink-in underneath the softer top.
Miracoil spring core
Miracoil continuous coil springs are divided into three separate zones of support. Each zone is there to support a different part of your body, which helps keep your hips and lower body held up while you sleep.
Layer details from mattressonline.co.uk and thesleepshop.co.uk product pages, October 2026.
Key benefits
- Room to share: At 135 x 190cm, or 4ft 6in x 6ft 3in, two people get 67.5cm each for two people sharing, the long-established UK standard for couples.
- Fits ordinary bedrooms: We suggest a room of at least 2.6m x 2.8m, which most UK doubles-by-name bedrooms meet, leaving space for wardrobes and drawers.
- Space for bedside tables: Because the UK double is 15cm narrower than the UK king, you can often keep bedside tables on both sides in rooms where a king would rule them out.
- Soft feel for two side sleepers: The cushioned top cradles shoulders and hips, which suits couples who both sleep on their side and like sinking in slightly.
- Easy to dress cheaply: Standard double sheets and a 200 x 200cm duvet are sold everywhere at every price, useful if you're kitting out a guest room or a first home.
This size suits you if...
You share the bed every night and want a proper couples' size without the footprint of a UK king, or you're furnishing a first flat or guest room where the bed has to leave space for a wardrobe and drawers. It also suits a solo sleeper who likes to spread out, and this soft, cradling feel rewards side sleepers in particular.
Consider another size if...
You and your partner differ a lot in weight, since a soft mattress at 67.5cm each for two people sharing can exaggerate roll-together. We'd recommend the UK king instead, which is 15cm wider and 10cm longer; allow at least 2.7m x 2.9m for it.
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FAQ's
Is the Silentnight Rio in a UK double big enough for two people?
Yes, with a caveat. The UK double is the traditional couples' size, giving 67.5cm each for two people sharing. Because the Rio is a soft mattress, a heavier partner may create some roll-together toward the middle. If either of you is restless or broad-shouldered, the UK king adds 15cm of width and 10cm of length.
Will the UK double Rio fit a bedroom with bedside tables on both sides?
Usually, yes. We suggest a room of at least 2.6m x 2.8m for a UK double, and around 3m x 3m is the comfortable norm. Within that, most rooms can take a table either side with walkway space left, which is one of the main reasons couples pick a UK double over a UK king.
Should I choose the Silentnight Rio in a UK double or a UK king?
It comes down to your room and how you sleep. The UK double is 15cm narrower and 10cm shorter than the UK king, and needs less floor space: we suggest 2.6m x 2.8m against 2.7m x 2.9m for the king. Given the Rio's soft feel, couples who move around a lot may appreciate the extra width of the UK king.
What are the dimensions of the Silentnight Rio UK double?
It measures 135 x 190cm, which is 4ft 6in x 6ft 3in. That's the standard UK double footprint, so any UK double bed frame, sheets and a 200 x 200cm duvet will fit it without hunting for special sizes.
Is the UK double Rio a good choice for a guest room?
It's a strong fit. Visiting couples can share it comfortably, the soft cushioned top is a forgiving feel for occasional use, and standard double bedding keeps costs down. Just check the room meets our suggested 2.6m x 2.8m minimum; if it falls short, the UK small double is 15cm narrower and we suggest at least 2.4m x 2.8m for it.