Hypnos Cawthorne Deluxe Mattress
Mattress
Hypnos Cawthorne Deluxe Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
25
Layers
5
Layer Details
- Soft White Fibres. Soft synthetic fillings sit at the top to create a cosy feel. They're durable and resilient, which means the surface should hold its shape rather than flattening quickly.
- Solotex™ fibres. A plush, highly breathable layer that increases airflow through the mattress. This helps dispel heat and moisture, so the sleep surface feels fresher through the night.
- eOlus™ fibre layer. Made from recycled material, this layer adds cushioning with a slightly firmer feel. It's there to keep you supported and comfortable all night.
- Dual density polyester fibre pad. One side adds an extra touch of comfort for you, the other supports the spring unit. Together they help distribute your weight evenly across the mattress.
- Pocket Springs (ReActive™). 1000 ReActive springs sit in individual fabric pockets and move independently. That means they respond to movement and target the areas of your body that need support.
Layer details from mattressonline.co.uk product page, September 2026.
- Fits where space is tight: At 90 x 190cm (3ft x 6ft 3in), it slots under a loft slope or alongside a desk and wardrobe with floor space to spare.
- Breathable for warm little sleepers: The Solotex fibre layer increases airflow, which means heat and moisture are drawn away rather than trapped, useful for children who run hot at night.
- Springy rather than sinking: All-fibre fillings over pocket springs give a responsive surface, so a restless child or a guest turning over gets an easy, bouncy feel instead of slow foam.
- Support that follows one sleeper: The 1000 pocket springs move independently and respond to where your body needs support, well matched to a single bed carrying one person.
- Simple bedding to buy: Standard single sheets and a single duvet fit, which keeps a guest room or first flat cheap and easy to kit out.
This size suits you if...
You're buying for a child's or teenager's room where the bed shares space with toys, a desk and a wardrobe, you need a dependable spare bed in a room that doubles as an office, or you sleep alone in a compact bedroom and want pocket spring comfort without giving the mattress the whole floor.
Consider another size if...
You're an adult who spreads out in the night, or the room can comfortably take something wider. Across this range we'd recommend the UK double instead: it's 45cm wider and the same length, and we suggest a room of at least 2.6m x 2.8m.
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Will the Hypnos Cawthorne Deluxe UK single fit a bunk or mid sleeper frame?
The footprint matches standard UK single frames at 90 x 190cm, so width and length are fine. Depth is the thing to check: this mattress is 25cm deep, and raised frames set a maximum mattress height so the guard rail still does its job. Check your frame's stated limit before buying.
What room size do I need for a UK single mattress?
We suggest allowing at least 2.1m x 2.8m of floor space for a UK single. That leaves room to walk round the bed and open drawers or a wardrobe, which matters in a child's room where the bed competes with storage and a desk. Loft rooms with a sloped ceiling often only take this narrow footprint.
Is the Cawthorne Deluxe in a UK single a good choice for a child or teenager?
It works well for older children and teens. The medium firm feel supports a growing back without being hard, and the fibre fillings breathe better than foam, so warm sleepers stay more comfortable. Very young children may not need this level of build, but it should see a teenager through years of use.
How much smaller is the UK single than the UK double?
The UK single is 45cm narrower than the UK double, and the two are the same length at 190cm. That width difference is what lets a UK single sit beside a desk or leave a walkway between two beds in a shared room, where a UK double would swallow the space.
Is a UK single long enough for a tall adult guest?
The UK single is 190cm long, or 6ft 3in, which suits most adults comfortably. Guests approaching that height may find their feet near the edge. If tall visitors are a regular fixture, the UK king is 10cm longer, though it needs a room of at least 2.7m x 2.9m.