J Marshall No. 3 Mattress

With 1,400 pocketed springs, the Plus Pillow Top is designed for exceptional depth of comfort and responsive support. No. 3 will contour your body to respond to every need and adjust pressure where needed. It's filled with an all-natural blend of materials: cotton, wool, sustainable bamboo, and soft alpaca and pashmina. For added support and comfort, J. Marshall have introduced an extra layer of memory wool to the mattress sleeping surface. A Belgian Damask ticking covers the mattress in breathable comfort. Read more

available Available (allow approximately 6 weeks for delivery)

RRP From £1390.00
from £1,045.00

Home Delivery
Home Delivery

FREE 2 Man Delivery & Installation to all but the most remote mainland UK postcodes

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Product Description

The Plus Pillow Top No. 3 offers sophisticated comfort that's hard to beat. Designed for a superb night's sleep, it's a mattress that will cater to your every need. 

With 1,400 pocket springs, it's engineered to combine the best from the science of sleeping well. Each pocket spring works independently to provide your body with optimal pressure-relieving support. The springs will effectively contour your body, adapting to each person's sleeping position. 

The mattress filling is carefully layered with an all-natural blend of materials: cotton, wool, sustainable bamboo, and soft alpaca and pashmina. These natural fibres complement each other to remove moisture and keep your mattress at its freshest. 

The top layer of memory wool is integrated onto the mattress to add an extra level of comfort to help improve your sleep. It's no secret that wool is incredibly effective as a natural, breathable fibre; it helps regulate body temperature and protects your mattress over the long-term.

No. 3 comes in one single tension that's suitable for all body weights.

The Viscose can cotton Belgian Damask ticking offers durable comfort and the health benefits of moisture removing breathable material. 

This mattress is designed for people who want to invest in quality that will take care of their wellbeing over the long-term. It's made in the UK using traditional hand-tufting techniques for long-term durability. A mattress made to last, it comes with a 10-year guarantee and is easy to maintain.

Every J Marshall bed can easily be broken down and recycled. From the springs to the natural fillings, unlike some foam mattresses. 

We understand that a quality mattress is an investment in the long-term and offer consultations to match you with a mattress which will ensure a good night's sleep.


Brand: J Marshall
Made in the UK: Yes
Mattress Upholstery Filling: Bonded Wool and Cotton
Pillow Top Upholstery Filling: Polyester, Wool, Pashmina, Bamboo, Alpaca and Cotto
Mattress Borders: 21 cm deep with protective wadding
Mattress Spring Type: Pocket Spring (42 mm Diameter)
Mattress Spring Count: 1400 (king size)
Surface Finish: Belgian Damask ticking (63% viscose, 37% cotton) hand-tufted with felt washers
Guarantee: 10 Years
Mattress Care: No-Turn
Tension: Available in one tension only

Why We Love The J Marshall No.3 Mattress

Environmentally friendly - 

Mattresses are hand-tufted in the UK using the finest biodegradable materials such as wool, cotton, silk, cashmere, and alpaca fleece, making J.Marshall the right choice for your health and the planet’s. Ditch the synthetic foam-stuffed alternatives for quality that won’t cost the earth.

Real value for money - 

100 years of bed-making expertise is packed into this award-winning mattress range to give you a great night’s sleep – every night. J.Marshall makes luxury accessible, with outstanding core technology, materials, and craftsmanship backed by a 10-year-guarantee.

Optimal comfort in a modern design - 

J.Marshall’s mattress and bed range tops the charts for body support, optimal comfort, and durability.
It’s an ideal choice for the modern professional who wants luxury packaged in a contemporary, sleek aesthetic.

Our Delivery Service


Large Item (Beds, Mattresses, Headboards, Sofa Beds and Furniture) delivery:


We offer a FREE 2-man white glove delivery and assembly service as standard for all orders over £500 for mainland UK addresses, excluding the most remote parts of the Scottish highlands which will carry a small surcharge.  For orders under £500, we ask for a small contribution of £25.

For non-mainland UK addresses including Northern Ireland and other UK islands we ask for a small contribution to the delivery charge, which will be calculated at the checkout once you enter your delivery address. For some very remote areas, we will display a message for you to contact our showroom so we can provide a quotation.

For Channel Islands and International deliveries, please contact our showroom, who will be able to discuss the delivery options with you and provide a quotation.

Our delivery and assembly service

We offer a 2-man delivery and installation service as standard on all large items to customers nationwide, using our in-house team or one of our specialist Delivery Partners. Our experienced delivery teams will carry your order to the room of choice (up to third floor as standard), where they will unpack and install the item and remove any packaging, leaving you free to enjoy your new bed or mattress.

We will contact you ahead of the planned delivery to agree a mutually convenient delivery date, most commonly between Monday and Friday although weekends are sometimes possible. The day before the delivery you will receive a 4-hour timed slot, so you know when to stay in to receive your delivery. On the day of delivery, our delivery team will call you when en-route to give you a more precise arrival time (unless you are the first delivery of the day).  They’ll also endeavour to keep you updated should they run into a traffic jam or get delayed by any unforeseen event. Once at your home the two-man delivery crew will carry the item to your desired room, assemble the item (where this service has been selected or is automatically included), and will remove any packaging.

Please do let us know at the time of placing the order if you have any restrictions or difficult access either inside the property or approaching the property, so we can look into the best solution for you.

If you would prefer a contact-free delivery service, this can be arranged.  Please just let us know in advance.

Recycling your old bed or mattress

Should you no longer have a need for your old mattress or bed, we can remove and recycle this item for you (on a like-for-like basis) when delivering your new order. There will be a charge of £45 per mattress or £60 per bed for this service.


Please ensure when placing the order that the item will fit into your home and there is sufficient access to your room, for example around a tight bend in your staircase or through a narrow doorway. If you are unsure, then our showroom will be more than happy to discuss the access with you. This way we can do all that we can to ensure the item fits in. We always try our hardest to find a solution.

Small Item delivery via Courier (Bedding & Bed Linen):


For smaller items such as bedding and bed linen, we charge a flat rate of £6.00 using a Next Working Day delivery service for all mainland UK addresses excluding the most remote parts of the Scottish highlands which will carry a small surcharge.  For customers who spend over £100 on Brinkhaus bedding we offer FREE delivery.

For Northern Ireland and most other UK islands we charge a flat rate of £12. For the most remote postcodes and International addresses, we will display a message for you to contact us so that we can provide a quotation.


Parcels will be delivered by a reputable, national courier and will require a signature on delivery, unless you request for the item to be left in a safe place or with a neighbour. In most instances, you will receive a text/email message on the day of the delivery (direct from the courier company) with a 1-hour timed slot. If that time slot is not convenient there will be various options on the message to leave in a safe place, deliver on a different day or leave with a neighbour, simply follow the instructions provided.

We deliver to all postcodes in mainland U.K., Northern Ireland and most UK islands (there may be some exceptions to the most remote postcodes).  If you require delivery outside of this area including the Channel Islands and International Deliveries, please contact snuginteriors directly for more information.

Lead times

Our delivery lead times vary across our product range and are kept up to date and quoted in good faith on each product page.

Stock orders: We aim to dispatch all orders from stock on a 24-hour (next day) delivery service. For orders placed before 1pm, we will endeavour to dispatch on the same day. If the order is received after 1pm, it may be dispatched the following day.

In the rare and unfortunate event that we are out of stock of an item, we will notify you and will arrange for your order to be dispatched directly from the manufacturer to keep the lead time and carbon footprint to a minimum. We will update you on any changes to lead time if applicable.

If you have any queries regarding our delivery service or if you have a specific date to meet, please contact our showroom and we can advise you if that will be possible – you can be assured, we always try our hardest!

Delivery costs are applied per order, not per item, and will be added at checkout.

For International Orders, please click here.

Please read our terms and conditions for further information.

Hassle-Free Returns

We want you to have the best experience with snuginteriors and recommend us to all your friends and family, to do this you must be happy with your order. If for any reason you are not happy and you wish to return your goods, we ask that you notify us in writing within 14 days of receipt of your goods. This 14-day period begins the day after you received the goods. Please ensure you keep your order in perfect condition.  This means unused, undamaged and, where possible, in the original packaging with the labels in tact. 


For small items, we will ask you to send the item(s) back to us securely wrapped to avoid any damage in transit via a recorded mail service, including your order number and receipt.  


For large furniture orders, we will arrange the return/collection of the goods.  Please note you will be charged collection for the item(s), unless it is faulty. 

For hygiene reasons, mattresses, bedding and bed linen can only be returned if they are in their original packaging and have not been opened, or used in any way. Try the mattress with the packaging on to be sure you are happy first!

We regret that we cannot cancel, refund or exchange a bespoke order that has been specially made for you (unless faulty). Read our full terms and conditions here.

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Frequently Asked Questions


Does spring count matter in a mattress?

Yes, to a certain extent.  First and foremost is the quality of the pocket spring.  You want a high quality pocket spring providing progressive support - this is the engine of your mattress.  Once you have this, you can compare spring count, and so long as the springs are comparable in quality, as a general rule of thumb the higher the number of pocket springs in the mattress, the more supportive the mattress.  Some manufacturers will try to inflate spring count by using thousands of mini springs, however these do not provide the same level of support as a full size spring, so whilst there may appear to be more pocket springs, the level of support will not be as good.

How do I know if I should buy a softer or firmer bed?

The mattress tension is normally determined by your body shape and weight, together with the feel you find most comfortable.

Generally, a heavier frame suits a firmer mattress with a more supportive spring. A lighter frame needs a softer spring so that the body’s weight can properly engage the spring and get the support it really needs. If a spring is too firm for the body’s weight, the person will just be lying on top of the mattress and not getting the full benefit.

Firm or orthopaedic is best for my back” is a common myth. Instead what is right, is the correct level of support for your body weight. This doesn’t need to be rock solid! Even with a firm spring you can still have added softness from the layers of upholstery in the mattress.

A correctly supporting mattress will see your spine lying straight. If the mattress is too soft, your spine will bow downwards. If it is too firm, it will bow upwards.

If a couple shares the bed, it is important to consider the different weights and shapes of both people, however, depending on the mattress size you are choosing and whether or not a combination tension is available, you will need to be guided by the weight of the heavier person. A mattress topper can always be added if the lighter person then requires more softness.

A simple test to find the best tension for you:
Slide your hand beneath the small of your back and the mattress. If it slides in too easily, the mattress is too firm. If it has to be forced under, it is too soft. It should be a snug fit. If you like to nestle into the mattress then we would recommend going for a softer tension or one with lots of generous upholstery.

Why is a pocket spring mattress better than an open coil mattress?

A pocket spring mattress is made up of thousands of individual springs nested in cotton pockets and hand laid in a honeycomb pattern. Each individual pocket spring works independently and reacts according to the weight that it receives, delivering a high level of support to the body as the springs are able to closely contour the body's shape and weight and provide progressive support.  

An open coil mattress is a traditional spring type made from a continuous piece of steel and forms one large spring. It is a very hardwearing spring type but it is not able to react in the same way as pocket springs, where each independent spring can adjust to the different weight and shape of the body.  The open coil spring does of course react to weight but a much larger area of spring is forced to move when put under pressure and the spring cannot contour the shape of the body so closely, so the level of support is not comparable.

Is a firm or orthopaedic mattress better for my back?

No, this is a common misconception. What is important when buying a new mattress is that you get a good supportive mattress to suit your bodyweight. This can still include soft layers of upholstery for excellent comfort.

If you choose a mattress that is too firm for your bodyweight, you will not be able to engage the springs and get the full benefit and support of the mattress, instead you will simply be lying on top of the mattress.  Equally, if you are buying a mattress that cannot support your bodyweight, you will be crashing through the mattress and again not getting the correct support to suit you.

The mattress tension will normally help guide your choice, together with an individual’s preference to a firmer or softer feeling mattress, their age and any previous back problems. For instance, an elderly person may prefer a firmer mattress as they may find it easier to get up out of.  Whilst a lighter weight person may prefer a finer gauge (soft spring) so that their body has more support and more contact points with the mattress.

It is also important to consider the base you are putting the mattress on and how this might alter the feel of the mattress.  

By getting a mattress that is tailored to suit you, such as a pocket spring mattress that will respond to your body’s shape and weight, you will get a much higher level of support and excellent comfort.

Here at snuginteriors, we are bed specialists, and our team are highly experienced and well trained to advise our customers on the best mattress to suit them, so if you would like any help in choosing your next mattress, please do not hesitate to give us a call.

What is a combination tension mattress?

A combination tension mattress is a one-piece mattress offering two tensions on the left- and right-hand side of the mattress.  They are available on selected mattress models in king size and above.  They are designed to suit couples with differing body weights, allowing the lighter person to go for a softer tension and the heavier person to go for a firmer tension. This gives a better level of support to the two differing bodyweights and ensures greater comfort.  There is no additional charge for choosing a combination tension. 

It is not possible to have a combination tension in a double sized mattress, this is because there is not enough space to have two different tensions. In this case, you will need to select the mattress tension that best suits the heavier weight person so that they are adequately supported, and you do not roll into each other.  You can then consider adding a mattress topper for additional comfort for the lighter weight person.


What is a zipped mattress?

A zipped mattress is a pair of mattresses joined together with a zip to make a larger one piece mattress, such as a pair of 90 x 200cm mattresses to create a one piece Super King 180 x 200cm. They are most commonly associated with Super King sizes and above and are popular for three reasons:

1) to allow people to separate the one piece mattress into twin mattresses (often zipped mattresses are paired with linked divan bases which can also split into two and provide twin beds.

2) They are a great option when somebody is looking for a larger size mattress but they have access issues getting a one piece mattress to the room of choice.

3) Turning two smaller mattresses is much easier than turning the weight of a very large and heavy one piece mattress.  Regular turning of mattresses ensures even usage and helps customers get the most out of the mattress for the long-term.