Alpha Kappa Black Pillow Top King Size Mattress
The Alpha Kappa Black Pillow Top Mattress combines a plush pillow top with individually wrapped pocket springs, which means soft, cushioned comfort on the surface, steady support underneath and less disturbance from a restless partner.
- Plush pillow top cushioning
- Minimises partner disturbance
- Reinforced edges add stability
£328
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Alpha Kappa Black Pillow Top Mattress
More available sizes
Mattress details
Mattress
Alpha Kappa Black Pillow Top Mattress
Size
Firmness
Medium
Construction
Foam
Memory Foam
Pocket Spring
Rolled
Depth (cm)
30
Layers
12
Layer Details
Knitted fabric cover
A soft-touch knitted outer cover that gives a breathable sleep surface. It's the first thing you feel, so it keeps the surface soft and airy.
Thermobond fibre
A fibre layer that helps the mattress keep its shape and structure. That supports durability over the long term.
Super soft roll foam
Soft foam layers that add plush, gentle cradling comfort. They give the pillow top its cushioned feel.
Non-woven fabric
A fabric layer that improves durability and flexibility while letting air move through. That means a cooler, more hygienic sleep.
High-density visco foam
A memory foam layer that adapts to your body's contours. It eases pressure and gives personalised comfort.
High resilient foam
A durable foam that supports you and springs back. It helps the mattress hold its performance over time.
Foam layer
A foam layer that balances support with shaping to your body. It helps spread pressure more evenly.
Second foam layer
An extra comfort layer that adds body contouring and support. It deepens the shaped feel of the upper mattress.
Pocketed coil spring system
Individually wrapped pocket springs that give targeted support, promote spinal alignment and minimise motion transfer. You get support that responds to each part of your body and less disturbance from a partner.
Foam encasement
Reinforced foam edges surround the spring unit. They improve edge support and keep the sides stable when you sit or sleep near the edge.
Felt layer
A felt layer that adds padding and support between the comfort layers and the spring core. It protects the layers above and helps durability.
Bottom quilt
The foundation layer of the mattress. It keeps the whole construction stable and structurally sound.
Layer details from alphabeddingco.com product page, October 2026.
Key benefits
- More room each: Two sharing get 75cm each, which is 7.5cm more each than a UK double, so an elbow or a turned shoulder is less likely to land on your partner.
- Fewer early-morning wake-ups: Individually wrapped springs move separately, which means a partner leaving for an early shift disturbs you a little less, especially with the extra width between you.
- Length for taller sleepers: The UK king is 10cm longer than a UK double, so a taller partner can stretch out with their feet still on the mattress.
- Usable right to the sides: A reinforced foam edge surrounds the springs, which helps you use the full 150cm width and makes sitting on the side to get up feel steadier.
- Space for extra pillows: The cushioned pillow top suits side sleeping, and the UK king leaves room for a support pillow during pregnancy without squeezing your partner out.
This size suits you if...
You share the bed every night and keep waking when your partner turns over, comes to bed late or gets up early. It also suits you if one of you is tall enough to find a 190cm mattress short, or the dog has started claiming the middle.
Consider another size if...
Your bedroom is smaller than our suggested 2.7m x 2.9m once wardrobes are in, or you want more than 75cm each. Alpha only lists this mattress in the UK king.
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FAQ's
Is the Alpha Kappa Black Pillow Top UK king big enough for two people?
For most couples, yes. The UK king gives 75cm each for two sharing, which is 7.5cm more each than a UK double. If you both sprawl or share with a dog most nights, it can still feel a little snug, as a UK super king would give 90cm each.
What room size do I need for a UK king Alpha Kappa Black Pillow Top?
We suggest allowing at least 2.7m x 2.9m. New build master bedrooms can feel smaller than their plans suggest once fitted wardrobes and bedside tables are in, so measure the clear floor space rather than the whole room before you buy.
Will a UK king Alpha Kappa Black Pillow Top suit a tall partner?
It should help. At 200cm long, the UK king is 10cm longer than a UK double, so a taller sleeper is less likely to have their feet over the end. The padded pillow top doesn't change that length, so you get the full 200cm to lie on.
Does the Alpha Kappa Black Pillow Top come in other sizes?
Alpha lists it in the UK king only, measuring 150 x 200cm (5ft x 6ft 6in). If you need a smaller or larger bed, you'll need a different mattress.
What bedding fits an Alpha Kappa Black Pillow Top king size?
Standard UK king sheets fit the 150 x 200cm surface, and a 230 x 220cm king duvet covers it. The mattress is 30cm deep, so check a fitted sheet's pocket depth before buying, as shallower sheets may pull off the corners.