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Comfort trial

Comfort fillings
Firmness rating

Support system
Enjoy the firm feel of the Hypnos Cawthorne Support Mattress. Featuring a core of ReActive™ springs for tailored support and breathable cotton and eOlus™ for refreshing comfort.

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

Natural cotton fibres create a perfectly fresh sleeping environment. The soft fillings regulate your body temperature and wicks away moisture.

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.

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 traditional and elegant design that holds fillings in place whilst enhancing the stability of the mattress. The luxurious tufting ensures zero shifting, shape loss or sagging.
Firmer and more supportive

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!

For your peace of mind

Expertly handcrafted in the UK. This product helps to support our economy and helps to reduce environmental impact.

This product conforms to BS7177: 2008, for use at home

For the highest standards of quality and safety
Explore the firm support and luxurious comfort of the Hypnos Cawthorne Support Mattress.
Supportive core
Experience ultimate support with 1200 unique ReActive™ springs that are personalised to your movement. Each spring sits within its own fabric pocket, helping to increase responsiveness and isolates movement. Delivering soothing support and reducing partner disturbance from motion.
The outer rows of the spring unit feature a firmer gauge to create a sturdy edge that does not dip under pressure. This is further reinforced with a durable rod edge so you can sleep right to the edge without a ‘roll off’ feel.
Completing the supportive core is a dual density polyester pad. This layer is designed to provide durable support to the spring unit, encouraging equal weight distribution. Helping you truly unwind each night.
Cotton comfort
The smart blend of cotton and polyester combines their comforting properties with increased breathability and moisture wicking. Helping you experience blissful comfort and a fresher sleep space that does not trap heat.
Refreshing fibres
Hypnos’ exclusive eOlus™ fibres are made from recycled materials and spun into breathable, comforting fibres. They promote airflow to dispel heat whilst offering a secure, firmer feel to keep you supported and cosy all night.
Firm support
Enjoy the firm feel of this mattress, a great choice if you’re looking for extra support. Traditionally tufted, this finishing secures the mattress layers in place and enhances the firm feel.
120 years of expertise
Holding over 120 years of expertise handcrafting luxury mattresses, the experts at Hypnos are skilled in delivering uncompromisable comfort and support.
Complete with a 5 Year Guarantee for ultimate reassurance.
This mattress comes with a 100-Night Comfort Trial - like all of our mattresses!
The trial lets you test your mattress for up to 100 nights. If it's not quite right for you, you can exchange it for a new one. To be eligible for the Comfort Trial, you'll need to purchase a mattress protector from MattressOnline with your new mattress.
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.
We deliver across the UK, with some remote areas offering alternative delivery options. Enter your postcode below to check which delivery options are available in your area.
Enjoy fast, reliable UK delivery with a delivery time slot confirmed on the morning of your delivery, live tracking and drop-off at your front door - or building entrance if you live in an apartment.
England FREE Delivery is free across England. Select postcodes in Cornwall, Cumbria and Lancashire are delivered to on set days rather than next day. |
Wales FREE Delivery is free across Wales. Select postcodes are delivered to on set days rather than next day. |
Scotland FREE or £40 The majority of Scottish postcodes are free, including Glasgow and Edinburgh. Select areas, including Aberdeen, Dundee, the Highlands and the islands, have a £40 charge. Select postcodes also require a longer delivery lead time. |
Northern Ireland £60 All BT postcodes have a £60 delivery charge and require 3 working days for delivery. |
Please use the postcode checker above for delivery information accurate to your address. For more information, head to our Delivery Page.
Delivery to a Room of Your Choice £20.00 We'll take the item to a room of your choice (excludes unpackaging) |
Mattress Recycling £35.00 We'll collect your old mattress and recycle it when we deliver your new one. |
| Firmness | Firm |
| Comfort fillings | Cotton, Soft White Fibres, Tufted |
| Support system | Pocket Springs |
| Pocket spring count | 1200 |
| Edge support | |
| Single-sided | |
| Guarantee | 5 years |
| Size | Width | Length | Depth |
|---|---|---|---|
| Single | 90cm | 190cm | 25cm |
| Small Double | 120cm | 190cm | 25cm |
| Double | 135cm | 190cm | 25cm |
| European Double | 140cm | 200cm | 25cm |
| King Size | 150cm | 200cm | 25cm |
| European King Size | 160cm | 200cm | 25cm |
| Superking | 180cm | 200cm | 25cm |
| Superking Zip and Link | 180cm | 200cm | 25cm |
| Emperor | 200cm | 200cm | 25cm |
Please allow for a tolerance of +/- 2cm
| Handcrafted in the UK | |
| Approved by the National Bed Federation | |
| Fire resistance | Conforms to BS7177: 2008, for use at home |
A balanced snapshot of what customers love (and what they don't), generated by AI.
Very good value and quality. Have noticed a great difference comfort wise
Verified Purchase
Excellent buying, best quality! I would definitely recommend it
Verified Purchase
Excellent quality thanks
Verified Purchase
Wonderfully firm mattress, helping to reduce my lower back pain from medical condition which is such a relief. Sizing is accurate and delivery was next day as promised. Very grateful.
Verified Purchase
Great service. Very comfortable mattress
Verified Purchase
Amazing. Very comfortable.
Verified Purchase
Absolutely perfect......best mattress I ever had grea,t price and delivery was perfect too. Would recommend in a fkash . Thankyou y Carol Hepburn
Verified Purchase
It was easy to order and quick delivery the mattress is fabulous great nights sleep I would like to ad the delivery men were great took all the wrapping away and put the mattress on my bed
Verified Purchase
A good supportive firm mattress.
Verified Purchase
The mattress is very comfortable. It is very firm, there is no softness on the outer edges so you don’t feel like you are falling out of bed. The delivery by Mattress-online was excellent. The delivery men were helpful and obliging despite the pouring rain and steps to gain access, followed by yet more steps to deliver to the first floor bedroom. I was very pleased with the whole experience. Highly recommended.
Verified Purchase
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Sunday: 10am - 4pm
Mon-Sat: 09:30am - 5:30pm
Sunday: Closed
customerservice@mattressonline.co.uk