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Comfort trial

Comfort fillings
Firmness rating

Support system
Indulge into incredible luxury with the Wentworth Mercer Deluxe Wool 4000. This mattress provides everything you need for a restorative slumber.

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

Stay snuggly all night long. Perfect all year round, wool is a natural insulator and has great temperature regulating properties.

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.

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.

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.

A traditional technique which creates a sturdier and more durable border. The stylish hand side-stitching method is used to improve longevity and edge-to-edge support.
Firmer and more supportive

About 11.4 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.

Prolong the incredible feeling of your mattress by flipping it over regularly. To enhance the performance and longevity of your mattress, flip over every few months.

For your peace of mind

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
Elevate your sleep into a heavenly slumber with the Wentworth Mercer Deluxe Wool 4000 Pocket Mattress.
Incredibly cosy
Elegantly filled with high quality natural fillings for a truly decadent rest. It features a layer of cosy wool fibres which are a great natural insulator. The fillings continuously regulate your body temperature whilst you sleep. So, you won't wake up if you are too hot or too cold.
These fillings are topped with polyester fillings. This material is very breathable which enhances the airflow through the mattress for a cooler rest.
Sprung construction
The core of this mattress is made up of 4000 pocket springs. The springs are made to actively adapt to your shape and movements. Because of its pocket design, the springs move independently to each other, allowing for more personalised support. The design allows for an undisturbed slumber because of it's no motion transfer element.
The sturdy steel of the springs have been twice tempered. This special design helps to improve the longevity of the springs and also enhances the bounce-back reaction. With the improved bounce-back rate, the springs expertly soothe built up pressure, aches and pains.
Strong border
Along the edge of the mattress is a thick rod wire. This rod wire secures the springs in place and creates a firmer mattress edge. With the springs right to the end of the mattress, this maximises the sleeping space so you can roll, stretch and sleep onto the edge.
Additionally, 2 rows of hand side-stitching have been created along the border. Stitched into the spring system for a more sturdy and durable finish.
High-quality finish
Wrapped in a cosy viscose cover and finished with an excellent standard. This mattress features a traditional tufted design. The construction of this creates a more stable sleeping surface by holding the fillings in place.
Excellent craftsmanship
Expertly handmade in the UK. This mattress has been crafted with time-honoured techniques, ideal for a high-quality finish. It comes with a 5 Year Guarantee, plus an additional 5 Year Warranty so you can buy with the utmost confidence.
Please note: The mattress cover material might look different than pictured but this will not affect the comfort or support of this mattress.
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 | Firm |
| Comfort fillings | Wool, Soft White Fibres |
| Support system | Pocket Springs |
| Pocket spring count | 4000 |
| Pressure relief | Yes |
| Border | Hand side-stitched |
| Double-sided | Yes |
| Single-sided | Yes |
| Guarantee | 5 years |
| Warranty | 5 years |
| Awards & accreditations | Handcrafted in the UK, Approved by the National Bed Federation |
| Fire resistance | Conforms to BS7177: 2008, for use at home |
| Downloads | Mattress Care Guide |
| Size | Width | Length | Depth |
|---|---|---|---|
| Single | 90cm | 190cm | 29cm |
| Small Double | 120cm | 190cm | 29cm |
| Double | 135cm | 190cm | 29cm |
| King Size | 150cm | 200cm | 29cm |
| Superking | 180cm | 200cm | 29cm |
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 room of your 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 |
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.
Within a couple of nights it had started to bag in the middle. I contacted Mattress Online to say that I wanted to exchange it. Opted for 30 nights. In the meantime I found it very uncomfortable and cant wait until I get the rock hard type! I have one of those on my double bed and I love it. I am quite small so have used a stool to help me onto the bed for years! Unfortunately having had an accident and did some harm I cant go back until bed is lower .. shorter base unit is on order. No complaints regards Mattress Online staff or the delivery .. first class.
Verified Purchase
Very honest. We told them what we needed and they selected several for us to try. Didn't go for the most expensive or an upsell. Actually paid less than what we were initially expecting. You could view that as them losing money, however, whenever someone we know wants a recommendation for a place to get a mattress, we will recommend this company. No pushing, no upsell, just meeting your needs. Cheap to remove old mattress too.
Verified Purchase
Very comfortable and high quality
Verified Purchase
Probably the comfiest mattress we have ever had, great support with plenty of comfort, really well made and looks amf feels like a high end hotel mattress.
Verified Purchase
1
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Sunday: 10am - 4pm
Mon-Sat: 09:30am - 17:30pm
Sunday: Closed
customerservice@mattressonline.co.uk