Firmness
Medium Firm
Type
Hybrid
Depth (cm)
Number of Layers
6
Trial Period (nights)
Warranty (years)
Price Range
£449
Best Sleeping Position(s)
Certifications
Assessed from Alpha's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
At £449 for a UK King, this is a fairly accessible price for a hybrid. The pocket spring unit is the main draw, which means better motion isolation for couples than a traditional open-coil design. Foam encasement around the edge should help the mattress hold its shape at the sides, useful if you sit on the edge to get dressed. The double quilted comfort foam adds softness at the surface while the high density layer beneath does the supportive work. One retailer lists a 10 year warranty, though Alpha's own page does not state a guarantee, so it is worth confirming terms with whoever you buy from before ordering.
Key Features & what's inside
- Premium Knitted Fabric. A knitted cover with antibacterial and skin-sensitive soft properties. It is the surface you actually touch, so the soft finish matters more than it sounds.
- Thermobond Fiber. A thermobond fibre layer sits beneath the cover. It adds a padded feel between you and the foam below.
- Two Comfort Foam Layers. Double layers of comfort foam in the quilt plus a high density, durable soft foam layer. This is where the cushioning comes from, with the denser foam helping the surface last.
- Pocket Coils Spring. Springs sit in separate bags, which means each one moves independently. Alpha says this lets couples sleep without feeling much of each other's movement.
- Foam Encasement. A foam border wraps the spring unit. This supports the edges, so you can use more of the mattress surface without a roll-off feeling.
- Felt. A felt base layer finishes the build. It gives the springs a stable foundation to work against.
Layer details from alphabeddingco.com product page, September 2026.
Who's it NOT for?
If you want a soft, cradling feel, the Medium Firm rating suggests this is not it. It is also only listed in UK King, so anyone needing another size will have to look elsewhere. And if published specs reassure you, the missing depth, spring count and trial details may be off-putting.
Alpha Delta Premium Mattress
Is the Alpha Delta Premium mattress firm or soft?
It's listed as Medium Firm, a middle-of-the-road feel with a supportive lean. Alpha's own product page does not state a firmness level, so this rating is the best guide available. Medium Firm generally suits back sleepers and heavier side sleepers, although lightweight side sleepers may find it slightly too firm.
Does the Alpha Delta Premium mattress come with a warranty?
The retailer stocking it lists a 10 year warranty. Alpha's own page does not state a guarantee, trial period or returns policy, so confirm the exact terms with the retailer before you buy.
Is the Alpha Delta Premium mattress good for couples?
It should be a reasonable pick. The pocket coils sit in separate bags, which means each spring moves independently and you feel less of your partner's movement. Foam encasement around the edge also helps two people use the full width of the bed.
What sizes does the Alpha Delta Premium mattress come in?
It is currently listed in UK King only, priced at £449. If you need a single, double or super king, you will need to consider a different model.
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