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The Trilogy is a pocket-sprung adjustable bed mattress from Adjust-A-Bed, designed and handmade in Great Britain and built specifically for use with an adjustable base. It's constructed around 1500 individually pocketed springs with Gel-Flex cooling foam and foam-encapsulated edges, finished with a Soft Knit Cool Touch Cover for effective temperature regulation. Available in a choice of Soft, Medium, or Firm tension, it lets you tailor the feel to your individual comfort needs while staying cool through the night.
A 1500-pocket-sprung adjustable bed mattress with Gel-Flex cooling foam and a Soft Knit Cool Touch Cover, available in a choice of Soft, Medium, or Firm tension, best suited to sleepers who want to select their own comfort level with effective temperature regulation through every base position.
Soft Feel: Our softest tension, designed for maximum comfort and pressure relief. Ideal for side sleepers, this feel allows shoulders and hips to gently sink into the mattress for a cushioned, cosy night's sleep.
Medium Feel: The Goldilocks option - not too firm, not too soft. Medium is the most versatile firmness level, balancing comfort and support in a way that suits most sleeper types.
Firm Feel: A supportive, solid feel designed to keep your body well supported throughout the night. Ideal for back and front sleepers, or those who prefer a firmer sleeping surface.
Best for
Not ideal for
1500 Pocket Spring System
What it is: 1500 individually wrapped springs. The upper part of each spring shapes to the body's contours while the lower part absorbs changes in weight distribution.
How it helps you sleep: Springs work independently to avoid rolling together, providing tailored support with minimal motion transfer between sleeping partners.
Gel-Flex Cooling Foam
What it is: A gel-infused foam layer designed to provide a cooling effect.
How it helps you sleep: Helps dissipate body heat, contributing to a cooler, more comfortable sleep experience.
Foam Encapsulated Edges
What it is: A high-density foam strip placed inside the edge of the mattress springs.
How it helps you sleep: Prevents the mattress sagging at the edge, giving a more supportive sleeping area and more usable edge-to-edge space.
Soft Knit Cool Touch Cover
What it is: A cover finished in highly conductive, intelligent fabric with built-in cooling technology.
How it helps you sleep: Draws heat away from your body to keep you cooler and more comfortable while you sleep.
| FEATURE | DETAIL |
|---|---|
| Brand | Adjust-A-Bed |
| Category | Mattress |
| Model | Trilogy |
| Firmness | Available in Soft (1/6), Medium (3/6), or Firm (5/6) - select at purchase |
| Mattress Type | Pocket spring with Gel-Flex cooling foam |
| Foam Free | No |
| Spring Count | 1500 |
| Comfort Layers | Gel-Flex cooling foam |
| Cover Material | Soft Knit Cool Touch Cover |
| Temperature Regulation | Yes - Gel-Flex cooling foam and Soft Knit Cool Touch Cover work together to draw heat away from the body |
| Care Instructions | No need to turn - rotate head to toe regularly to extend lifespan |
| Compatible Bed Bases | Adjustable bases only |
| Single or Double Sided | Single sided - do not flip |
| Country of Manufacture | Great Britain |
| Maximum Weight Per Side | 25 stone (158kg) per side |
| Guarantee | 5 years |
| Ideal For | Hot sleepers, couples, all-round sleepers (tension dependent) |
| Fire resistance | All mattresses are BS7177:2008 compliant |
| SIZE | WIDTH x LENGTH x DEPTH | CONFIGURATION |
|---|---|---|
| Adjustable Small Single | 75cm (2ft6) x 200cm (6ft6) x 28cm (11.0'') | Single piece |
| Adjustable Single | 90cm (3ft) x 200cm (6ft6) x 28cm (11.0'') | Single piece |
| Adjustable Small Double | 120cm (4ft) x 200cm (6ft6) x 28cm (11.0'') | Single piece |
| Adjustable Double | 135cm (4ft6) x 200cm (6ft6) x 28cm (11.0'') | Single piece |
| Adjustable King Size | 2 x 75cm (2ft6) x 200cm (6ft6) x 28cm (11.0'') | Split design - 2 mattresses |
| Adjustable Super King Size | 2 x 90cm (3ft) x 200cm (6ft6) x 28cm (11.0'') | Split design - 2 mattresses |
Vs choosing a single-tension adjustable mattress: Most adjustable bed mattresses come in one fixed tension, so you need to know in advance whether you want a softer or firmer feel. The Trilogy removes that guesswork - Soft, Medium, and Firm are all available in the same model, so you can pick the tension that suits your body and sleep style directly.
Vs the foam-only Tri-Comfort: Both the Trilogy and the Tri-Comfort offer a choice of Soft, Medium, or Firm tension, but the Trilogy uses 1500 pocket springs with Gel-Flex cooling foam and a named, actively cooling Soft Knit Cool Touch Cover, while the Tri-Comfort is a foam-only, multi-layer construction. If temperature regulation and a spring-based feel matter most to you, the Trilogy is likely the better fit; if you prefer a foam-only surface, the Tri-Comfort may suit you better.
Vs buying with a base: This mattress is also available together with a matching Adjust-A-Bed adjustable base - useful if you are buying your first adjustable bed and want guaranteed compatibility between base and mattress. If you already have a compatible adjustable base and simply want to upgrade the mattress, this mattress-only option lets you do that without replacing the whole bed. The paired bed and base listing can be found here.
The Trilogy is backed by Adjust-A-Bed's 5-year manufacturer's guarantee against defects in materials and workmanship. Given the pocket spring, Gel-Flex, and cool-touch cover construction, this is a mattress built for consistent, cooling comfort over time, and the guarantee reflects that.
The Trilogy delivers 1500-pocket-sprung support with Gel-Flex cooling foam and a Soft Knit Cool Touch Cover, in your choice of Soft, Medium, or Firm tension, designed and handmade in Great Britain and backed by a 5-year guarantee. If you want to select your own comfort level, run hot at night, or simply want a spring-based mattress that holds its shape through every adjustable position, this is one to consider.
Not sure which Adjust-A-Bed mattress is right for you? See our Adjustable Bed Buying Guide for guidance on tension, base compatibility, and comfort levels.
| WHAT'S INCLUDED? | |
|---|---|
| Mattress | Yes |
| Base | No |
| Headboard | No |
PLEASE NOTE:
All measurements are approximate and are subject to a tolerance of + or - 2cm.
Image is for illustration purposes only.
Pillows, cushions, throws and bed dressings not included.
Lovely mattress. We got the medium tension which suits us very well.
read moreYes this mattress is designed to be used on an adjustable bed.
This mattress is 28cm deep.
An adjustable mattress is designed to flex and contour to different positions when used with an adjustable frame which allows for customised comfort and support. A regular mattress is designed to lay flat and cannot be bent.
Yes, you can sleep on your mattress straight away.
This product has properties that help wick away moisture allowing air to circulate through the mattress. Therefore in most situations this mattress won't cause excessive heat.
Made to measure mattresses and divan bases are available – please call 01928 242829.
Our experienced delivery team can take away your old bed or mattress when delivering your new one. Please ensure you have dismantled your old bed prior to delivery.
Simply add this service to your order at checkout.
What products will you remove?
We will remove mattresses, divan beds and bed frames (subject to all beds being dismantled first). Add this convenient service to your order at checkout.
Do I need to dismantle my old bed before collection?
Yes, your old bed must be fully dismantled.
Can I add Removal and Recycle on after placing my order?
You can either add it to your order on the basket page and pay at checkout, or if you would like to add it after you have checked out, simply contact us on 01928 242829 before your order is due for delivery.
Do you recycle the beds and mattresses you collect?
When we remove your old bed or mattress, we ensure that it is disposed of in an environmentally responsible way. All products are sent to The Furniture Recycling Company, the UK's largest and most trusted furniture recyclers.
Our skilled drivers deliver throughout the UK and will deliver straight to your home. Free doorstep delivery is available on many products and you can also choose delivery to room of choice for an additional fee.
How much is delivery?
We offer free delivery to most of the mainland UK for orders over £100; there are applicable charges for deliveries to the highlands or far out UK, which can be found by putting your postcode into the delivery section on the product page. For orders under £100, there is a £10 charge.
How long does delivery take?
Once you select the required product, an approximate delivery time will be quoted on the product page before adding the item to your basket. During checkout, you will either be given the option to select your date, or we will state an estimated time for delivery. Once you have placed your order, we will contact you to book a date within the timeframe quoted.
Will I be contacted beforehand to arrange a delivery slot?
Once you have placed an order, our delivery team will contact you directly to arrange a suitable delivery slot, either via email, call, or text message.
Can I choose my delivery day?
If the product is available for next-day delivery, you can select a date at checkout. For all other products, you will be presented with an estimated timeframe for delivery. After placing your order, our delivery team will contact you via e-mail, text or call to arrange a suitable delivery day/time.
Read all our Delivery FAQs
We have an easy returns policy: If you change your mind, we're happy to accept returns within 14 days of you receiving your product, as long as they are unused and unassembled. However, for hygiene reasons, we can't take back products that have been slept on, unless there's a fault.
Custom-made products can only be returned if they are faulty.
Please take a look at our Terms & Conditions.
Can I return a mattress I've slept on?
Normally, mattresses can only be returned if they're unused within 14 days. But if your mattress has a trial period, please refer to the mattress trial information page for further details.
How long do I have to return an item I've purchased online?
You have 14 days to return an item if bought online, subject to the item not being used or assembled. Please note, if you wish to inspect a mattress, please ensure the protective outer plastic packaging is not removed, as this may affect your right to return due to health and hygiene reasons. Any product that is made to order/customised cannot be returned unless faulty.
Do I have to pay for the return?
To return your product, you can either arrange the return yourself, or we can happily arrange it on your behalf for a charge, which will be deducted from your refund. The collection charge covers the expenses involved in picking up the item from your location and safely bringing it back to our warehouse. For bedding items, the amount is £20, and for large/bulky items, charges start from £95 (depending on the product/postcode).
Can I return a part or fully assembled item?
Unfortunately, once an item is assembled, whether partially or fully, we can't accept returns unless the item is faulty.
Read all our Returns FAQs
Our skilled drivers deliver throughout the UK and will deliver straight to your home. Free doorstep delivery is available on many products and you can also choose delivery to room of choice for an additional fee.
How much is delivery?
We offer free delivery to most of the mainland UK for orders over £100; there are applicable charges for deliveries to the highlands or far out UK, which can be found by putting your postcode into the delivery section on the product page. For orders under £100, there is a £10 charge.
How long does delivery take?
Once you select the required product, an approximate delivery time will be quoted on the product page before adding the item to your basket. During checkout, you will either be given the option to select your date, or we will state an estimated time for delivery. Once you have placed your order, we will contact you to book a date within the timeframe quoted.
Will I be contacted beforehand to arrange a delivery slot?
Once you have placed an order, our delivery team will contact you directly to arrange a suitable delivery slot, either via email, call, or text message.
Can I choose my delivery day?
If the product is available for next-day delivery, you can select a date at checkout. For all other products, you will be presented with an estimated timeframe for delivery. After placing your order, our delivery team will contact you via e-mail, text or call to arrange a suitable delivery day/time.
Read all our Delivery FAQs
We have an easy returns policy: If you change your mind, we're happy to accept returns within 14 days of you receiving your product, as long as they are unused and unassembled. However, for hygiene reasons, we can't take back products that have been slept on, unless there's a fault.
Custom-made products can only be returned if they are faulty.
Please take a look at our Terms & Conditions.
Can I return a mattress I've slept on?
Normally, mattresses can only be returned if they're unused within 14 days. But if your mattress has a trial period, please refer to the mattress trial information page for further details.
How long do I have to return an item I've purchased online?
You have 14 days to return an item if bought online, subject to the item not being used or assembled. Please note, if you wish to inspect a mattress, please ensure the protective outer plastic packaging is not removed, as this may affect your right to return due to health and hygiene reasons. Any product that is made to order/customised cannot be returned unless faulty.
Do I have to pay for the return?
To return your product, you can either arrange the return yourself, or we can happily arrange it on your behalf for a charge, which will be deducted from your refund. The collection charge covers the expenses involved in picking up the item from your location and safely bringing it back to our warehouse. For bedding items, the amount is £20, and for large/bulky items, charges start from £95 (depending on the product/postcode).
Can I return a part or fully assembled item?
Unfortunately, once an item is assembled, whether partially or fully, we can't accept returns unless the item is faulty.
Read all our Returns FAQs
