Wentworth Mercer Premium Silk 11000 Pocket Mattress
Mattress
Wentworth Mercer Premium Silk 11000 Pocket Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
28
Layers
6
Layer Details
- Silk. A luxurious natural fibre that gives the sleep surface a sumptuous, breathable feel. It stays resilient over time rather than flattening quickly.
- Wool. Wool is a natural insulator with good temperature regulation, which means it helps keep you comfortable all year round. Cosy in winter, breathable in summer.
- Cotton. Natural cotton fibres wick moisture away from your body and help regulate temperature. The result is a fresher-feeling sleep surface, especially if you run warm.
- Soft White Fibres. Soft synthetic fillings add a cosy, cushioned feel to the comfort layers. They are durable and hold their shape well.
- Mini Pocket Springs. Small individually cased springs sit near the surface for added comfort and gentle pressure relief. They also cut down motion transfer, so you feel less of a partner's movement.
- Pocket Springs. The main support layer: individual springs encased in cloth pockets that respond to each part of your body separately. That means more tailored support along your spine than a traditional open-coil system gives.
Layer details from mattressonline.co.uk product page, September 2026.
- Space to sprawl on your own: At 30cm wider than the UK single, the UK small double lets a solo sleeper turn from side to back without edging towards the drop.
- A little more floor to spare: Being 15cm narrower than the UK double, it leaves slightly more clearance for a door to swing or a wardrobe to open in a box room.
- Easier to place under a sloping ceiling: In a loft conversion, the narrower footprint makes it simpler to set the bed where you have enough headroom to sit up and climb out.
- Calmer for occasional couples: The mini pocket springs cut down motion transfer, which means two guests on a narrower surface are less likely to wake each other when one turns over.
- No hunt for bedding: Frames and fitted sheets for a 4ft bed are easy to find on the high street, so you won't need anything made to order.
This size suits you if...
You sleep alone and feel hemmed in on a single, your teenager has outgrown their bed but the room can't give up more floor, or you're furnishing a guest room where couples stay only now and then.
Consider another size if...
Two of you will share the bed every night. We'd recommend the UK double instead, which gives 67.5cm each for two sharing. We suggest at least 2.6m x 2.8m for the UK double.
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What room size do I need for a Wentworth Mercer Premium Silk 11000 small double?
We suggest allowing at least 2.4m x 2.8m for a UK small double. That leaves room to walk around the bed and open doors. If your room is tighter, the UK single needs less space, and we suggest at least 2.1m x 2.8m for it.
Is a small double Premium Silk 11000 a good upgrade for a teenager?
For width, yes. The UK small double is 30cm wider than the UK single, which is a real difference for a teenager who has started to sprawl. The UK single and the UK small double are the same length, though. If they're very tall, the UK king is 10cm longer, but it needs a much bigger room.
Wentworth Mercer Premium Silk 11000 small double or double: which should I buy?
Choose the UK small double if you sleep alone or the room is tight, because it is 15cm narrower than the UK double. Choose the UK double if you share every night. It gives 67.5cm each for two sharing, and we suggest at least 2.6m x 2.8m for it.
Will a UK small double fit in a loft conversion bedroom?
Often, yes, provided the floor area is at least 2.4m x 2.8m, which is our suggested minimum. Headroom matters as much as floor space in a loft. The UK small double is narrower than the UK double, so you have a little more choice about positioning the bed where the ceiling is high enough to get in and out easily.
Is the Premium Silk 11000 in a UK small double good for a guest room?
It suits a guest room well if most visitors come alone and couples stay only occasionally. Solo guests get generous width, and the mini pocket springs help limit disturbance when two do share. For a spare room where couples stay regularly, the UK double gives 67.5cm each for two sharing.