up to
35% off
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Comfort trial

Comfort fillings
Firmness rating

Support system
Fall into a dreamy slumber with the Alpha Theta Premium Pillow Top Mattress. This mattress provides personalised support with 650 pocket springs and blissful pressure relief with layers of foam comfort.

Individualised springs encased in cloth pockets. Expertly adapting to movement to distribute personalised support to each part of your body.

Soft and flexible reflex foam enhances the support needed for excellent spinal alignment. The sumptuous nature doesn't compromise on the cosy comfort either.

Soft synthetic fillings create an incredible cosy feel. These fillings are durable and resilient, maintaining its shape and quality. A great balance between comfort and value for money.
Not too soft, not too firm - the perfect balance

Durable edge-to-edge support provides a maximised sleeping surface for a more secure sleep. Sit and lay comfortably right to the very edge with zero 'roll-off' sensation.

A rolled-up mattress is efficiently packaged for easy manoeuvring. Because of its smaller, compact design, less delivery vans are needed, providing a great environmentally-friendly option.

With a single-sided mattress, there's no need to flip. Simply rotate every few months to care for your mattress. Fuss free mattress maintenance!

About 11.8 inches deep. Depth is an important factor when buying a mattress as it can affect the suitability for particular bedding, mattress toppers and bed frames.

For your peace of mind

This product conforms to BS7177: 2008, for use at home
The Alpha Theta Premium Pillow Top Mattress is designed for deep comfort and lasting support.
Supportive core
Experience support tailored to your movement with a core of 650 pocket springs. This spring system responds to your body as you move in the night to ensure you are supported in every position. It encourages healthier spinal alignment to ease aches for a better sleep.
Comfort layers
With a depth of 30cm, the Alpha Theta Premium features layers of deep comfort. Starting with a plush pillow top that welcomes your body into bliss. A dense layer of Thermobond polyester fibres provides firm comfort and helps retain the mattress shape.
Additional layers of super soft foam and high density soft foam cushion around your unique body shape. Helping to lift weight off your body, improving circulation and delivering pressure relief.
The comfort layer is complete with layers of resilient Reflex foam that provide added blissful comfort and increased pressure relief.
Balanced feel
Rated medium, the firmness of this mattress is not too soft or too firm, providing a balanced feel. This is an ideal firmness compromise when sharing the bed with a partner if you are struggling to decide.
Edge support
The pocket springs feature foam encapsulation, reinforcing the border for a firmer feel. This means you can lounge and sleep comfortably across your entire mattress without a ‘roll off’ feel.
Easy upkeep
Delivered rolled, you don’t have to navigate carrying your mattress past tricky staircases or narrow hallways. Simply carry to your room of choice and unpack with ease.
This mattress is single-sided which means you do not have to strain to flip it. Rotate top to toe seasonally to encourage even wear and reduce early signs of dips to the surface.
Purchase with confidence
The Alpha Theta Premium has been crafted with care to provide quality comfort and support. This mattress includes a 10 Year Warranty for added reassurance.
This mattress comes with a 60-Night Comfort Trial - like all of our mattresses!
The trial lets you test your mattress for up to 60 nights. If it's not quite right for you, you can exchange it for a new one.
It can take some time to get used to a new mattress, which is why we ask you to sleep on your mattress for 30 nights. If you're not happy with the feel after 30 nights, simply contact our Customer Service Team, and we'll arrange a mattress exchange.
| Firmness | Medium |
| Comfort fillings | Reflex Foam, Soft White Fibres |
| Support system | Pocket Springs |
| Edge support | Yes |
| Rolled-up | Yes |
| Single-sided | Yes |
| Warranty | 10 years |
| Fire resistance | Conforms to BS7177: 2008, for use at home |
| Size | Width | Length | Depth |
|---|---|---|---|
| Double | 135cm | 190cm | 30cm |
| King Size | 150cm | 200cm | 30cm |
Please allow for a tolerance of +/- 2cm
The following delivery methods apply to mainland England and most of Scotland, Wales and Northern Ireland. Please read our delivery page for more information.
Next day delivery (weekdays only) Order before | FREE |
Weekday of your choice Order up to 60 days ahead | FREE |
Weekend On Saturday or Sunday of your choice | £17.50 |
Delivery to the front door of your building | Yes |
Two-hour delivery time slot We’ll let you know on the day before your delivery | Yes |
Call to let you know we’re on our way On your delivery day | Yes |
Delivery to your room of choice | FREE |
Mattress recycling We'll take away your old mattress | £35.00 |
Delivery is on an all-day service, 7am - 8pm for mainland England and most of Scotland, Wales and Northern Ireland.
Need further information? Please visit our Delivery page.
Mon-Sat: 9:30am - 5:30pm
Sunday: 10am - 4pm
Mon-Sat: 09:30am - 17:30pm
Sunday: Closed
customerservice@mattressonline.co.uk