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Comfort trial

Comfort fillings
Firmness rating

Support system
Step into the future of sleep with the Adventurer! This stellar mattress features cooling memory foam and medium-firm, orthopaedic support for your back. Welcome to years of dreamy sleep.

Memory foam creates a cushioned feel by cradling to your unique shape. Enhancing the remarkable comfort, the foam has a sumptuous feel, delivering a cosy sleep.

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

A sumptuously soft finish that provides additional cosiness and warmth. Knitted covers enhance airflow and are incredibly breathable. So, you can enjoy a cooler snooze.

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.

Special design made to create your own personal sleep zone. No distractions or disturbances when your partner moves. So you can enjoy an undisturbed rest.

Offering a soothing night's rest by evenly distributing your body weight across the mattress. The pressure point relief provides the ultimate relaxation needed for a deep slumber.

Free of allergens for a cleaner, healthier sleep. No allergenic materials were used so you can enjoy an undisturbed rest without the risk of allergy reactions or respiratory problems.
Firmer than a medium mattress for extra support

About 9.8 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.

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!

Stitched into the mattress border, turning handles are there for easier moving and turning. When caring for your mattress, simply use the handles provided for ease of use.

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.

For your peace of mind

This product conforms to BS7177: 2008, for use at home
Journey into the future of sleep with the Horizon Adventurer 1000 Pocket Memory Mattress!
Bamboo memory foam
A layer of bamboo memory foam moulds around your unique shape, helping to relieve built up pressure on your body and ease aches. Infused with bamboo, the foam is highly breathable to help dispel heat and moisture. Promoting a cooler, fresher feel than traditional memory foam.
Completing the comfort of this mattress is a layer of high density foam. Durable and cushioning, this layer offers ideal comfort and also helps to reduce motion transfer. So you can sleep undisturbed by tossing and turning when sharing the bed.
Orthopaedic care
The Adventurer is orthopaedic. This means it encourages good postural alignment as you sleep. It's perfect if you're looking for enhanced care to support your back.
Personalised support
Nestled underneath this memory layer, 1000 pocket springs work hard to provide exactly the right support for each area of your body. The support is personalised to you, and helps reduce motion transfer between you and your partner.
Perfectly balanced comfort
If you're looking for that best-of-both-worlds feel, search no more. We rate the Adventurer medium-firm. This makes it a great choice if you want plenty of support without compromising on comfort.
Prefer a firmer feel? Take a look at the Horizon Discovery!
Healthy sleep
The Adventurer is hypoallergenic - so it's ideal if you suffer from allergies. Helping you sleep undisturbed with reduced skin irritation.
More space to sleep
The more space we have, the better sleep we get. The mattress borders are reinforced with extra-firm sturdy foam. Not only does this stop roll-off, but you can sleep right to the very edge!
Made for busy lives
This easy-care mattress is a breeze to keep in great condition. Plus, since it's single-sided, you don't need to flip it over. All you need to do is rotate it once every 3 months, using the built-in turning handles.
Planet-friendly design
Since the Adventurer arrives rolled-up, we can fit more into each delivery. That means we can reduce our carbon emissions and help protect our world for generations to come.
Easier set-up
Rolled mattresses are easier to move around your home - especially if you have narrow stairs. Once you've placed your mattress on your bed, simply unwrap and allow it to expand. You can sleep on it in 3-4 hours.
Journey into the future of sleep
The future of sleep is here. Enjoy cool comfort and ortho support as soon as tomorrow the Adventurer!
Disclaimer: To keep your mattress in perfect condition, you should unroll your mattress within 3 months of it being delivered. This ensures that your new mattress will unroll smoothly and it will keep it clean and fresh.
Weights: Single: 20.5kg, Small Double: 24.1kg, Double: 30kg, King Size: 35.2kg, Superking: 43kg
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 to firm |
| Comfort fillings | Memory Foam |
| Support system | Pocket Springs |
| Pocket spring count | 1000 |
| Edge support | Yes |
| Cover | Knitted cover |
| Allergy care | Hypoallergenic |
| Pressure relief | Yes |
| No roll-together | Yes |
| Turning handles | Yes |
| Rolled-up | Yes |
| Single-sided | Yes |
| Guarantee | 5 years |
| Fire resistance | Conforms to BS7177: 2008, for use at home |
| Downloads | Horizon Product Care and Guarantee |
| Size | Width | Length | Depth |
|---|---|---|---|
| Single | 90cm | 190cm | 25cm |
| Small Double | 120cm | 190cm | 25cm |
| Double | 135cm | 190cm | 25cm |
| King Size | 150cm | 200cm | 25cm |
| Superking | 180cm | 200cm | 25cm |
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 Free upgrade for King Size and Superking to your room of choice | 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 upgrade for King Size and Superking | £20.00 |
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.
A balanced snapshot of what customers love (and what they don't), generated by AI.
Medium to firm mattress. Blissfully comfortable.
Verified Purchase
Second time I've bought this mattress (for another bed). Very comfortable and supportive at an extremely fair price. 5 stars from me!
Verified Purchase
A very comfortable mattress, arrived in good time. Everything we expected.
Verified Purchase
Happy with the purchase
Verified Purchase
Easy to order and it came on time. It was vacuum packed and was to its full size after 24 hours.
Verified Purchase
Just the right balance of form mattress support but soft topping. Very pleased
Verified Purchase
The mattress is too firm, causing both of us very painful morning stiffness. I don't recommend this brand
Verified Purchase
Excellent mattress delivered next day
Verified Purchase
Firm and supportive but very comfortable
Verified Purchase
Really comfortable mattress. Didn't realise what I was missing. Highly recommend for side sleepers.
Verified Purchase
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Sunday: 10am - 4pm
Mon-Sat: 09:30am - 17:30pm
Sunday: Closed
customerservice@mattressonline.co.uk