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The Sealy Holst offers a supremely comfortable, hygienic sleep surface with its ProShield® treated cover. Built around a perfect combination of AlignSupport™ Coil springs and ComfortCore™, the Holst provides body-hugging comfort, outstanding support and superb pressure relief, leaving you feeling ready for the day ahead after a well-rested night's sleep. SmarTex™ Fibres draw moisture away to keep you cool, while the Pillow Top adds a generous layer of plush, cushioned comfort - genuine Sealy quality, proudly made in Cumbria, Great Britain.
A quilted mattress with a Pillow Top, built around Sealy's AlignSupport™ Coil and ComfortCore™ technology, best suited to sleepers who want a versatile medium feel, effective cooling and an allergen-resistant sleep surface.
Medium Feel - 3/6: 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.
Best for
Not ideal for
AlignSupport™ Coil
What it is: Sealy's patented coil, heat treated twice for an initial response and deep-down support.
How it helps you sleep: Evenly distributes your body weight to offer a supportive sleep, providing excellent spinal alignment and maximising comfort night after night, year after year.
ComfortCore™
What it is: A comfort layer positioned to provide exceptional pressure relief.
How it helps you sleep: Aids spinal alignment and helps soothe aches and pains, so you wake feeling rested.
InfiniLux™ Comfort Layer
What it is: A premium foam layer offering durability alongside sumptuous comfort.
How it helps you sleep: Provides a plush, comfortable sleeping surface with lasting support night after night.
Medium and Firm Foam
What it is: A high-quality, durable foam providing a balance of medium softness and firm support.
How it helps you sleep: Adds a further layer of consistent, comfortable support throughout the night.
UniCased®
What it is: A structural feature that brings form to every part of the mattress.
How it helps you sleep: Extends the usable sleeping area and prevents the uncomfortable roll-off feeling at the edges.
BasePlank
What it is: An integral foundation that underpins the entire mattress, working with the AlignSupport™ Coil.
How it helps you sleep: Provides a firm, stable base for the whole mattress system, working with the spring system to deliver enhanced, consistent support.
SmarTex™ Fibres
What it is: A fabric woven with fibres that draw moisture away from the body.
How it helps you sleep: Helps regulate your temperature, keeping you cool all night long.
ProShield® Treatment
What it is: A protective treatment applied to the mattress cover that guards against allergens, endorsed by Allergy UK.
How it helps you sleep: Creates a clean, fresh sleeping environment by keeping allergens at bay, particularly beneficial for those with sensitivities.
Pillow Top
What it is: An extra layer of cushioning sewn onto the top of the mattress.
How it helps you sleep: Increases softness and comfort at the sleep surface, easing pressure points for a more luxurious feel.
Quilted Cover
What it is: A quilted sleeping surface and mattress border.
How it helps you sleep: Provides soft cushioning and added comfort across the whole sleep surface.
Handles
What it is: Handles fitted to both sides of the mattress.
How it helps you sleep: Makes it easy to reposition the mattress, helping you maintain it properly for long-lasting comfort.
| FEATURE | DETAIL |
|---|---|
| Brand | Sealy |
| Category | Mattress |
| Model | Holst |
| Firmness | Medium (3/6) |
| Mattress Type | Quilted mattress with Pillow Top, AlignSupport™ Coil and foam comfort layers |
| Pillow Top | Yes |
| Spring System | AlignSupport™ Coil |
| Comfort Layers | ComfortCore™, InfiniLux™ Comfort Layer, Medium and Firm Foam |
| Mattress Finish | Quilted |
| Edge Support | Yes - UniCased® |
| Temperature Regulation | Yes - SmarTex™ Fibres draw away moisture |
| Hypoallergenic | Yes - ProShield® Treatment, endorsed by Allergy UK |
| Care Instructions | Easy Care - no need to turn, rotate head to toe regularly to extend the mattress's lifespan |
| Handles | Yes - both sides |
| Compatible Bed Bases | Slatted (slats no more than 7cm apart) and divan bases |
| Single or Double Sided | Single sided - do not flip |
| Country of Manufacture | Great Britain |
| Maximum Weight Per Side | 114kg (18st) |
| Guarantee/Warranty | 7 years |
| Mattress Trial | 100 nights |
| Ideal For | Side sleepers, back sleepers, front sleepers |
| Certifications | National Bed Federation (NBF) Approved ProShield® Treatment - endorsed by Allergy UK |
| Fire resistance | BS7177:2008 compliant |
| Packaging Type | Flat-packed |
| SIZE | WIDTH x LENGTH x DEPTH | WEIGHT |
|---|---|---|
| Single | 90cm (3ft) x 190cm (6ft3) x 30cm (11.8'') | 23kg (50lbs) |
| Double | 135cm (4ft6) x 190cm (6ft3) x 30cm (11.8'') | 33kg (72lbs) |
| King Size | 150cm (5ft) x 200cm (6ft6) x 30cm (11.8'') | 38kg (83lbs) |
| Super King Size | 180cm (6ft) x 200cm (6ft6) x 30cm (11.8'') | 46kg (101lbs) |
| Super King Size Zip & Link | 2 x 90cm (3ft) x 200cm (6ft6) x 30cm (11.8'') | 2 x 47kg (104lbs) |
Vs firmer mattresses: The Holst's Pillow Top and InfiniLux™ layer give noticeably more cushioning than a firmer mattress, while AlignSupport™ Coil and ComfortCore™ still provide dependable underlying support. If you want a versatile medium feel with genuine cooling, this is the better choice. Firmer mattresses suit those who want a more rigid, no-give surface throughout.
Vs softer mattresses: This mattress has more underlying structure than a soft mattress, thanks to the AlignSupport™ Coil and BasePlank foundation, helping it maintain support for back, front and combination sleepers. Softer mattresses can feel plusher at first touch but may not offer the same consistent support over time.
Vs premium and luxury mattresses: This mattress shares the same patented AlignSupport™ Coil technology and ProShield® treatment found in higher-priced Sealy ranges. The difference is typically in the depth and number of comfort layers, rather than any compromise in spring quality or craftsmanship.
The Holst is backed by Sealy's 7-year manufacturer's guarantee against defects in materials and workmanship. Given the patented AlignSupport™ Coil construction, this is a mattress designed to last - the guarantee reflects that.
National Bed Federation (NBF) Approved - Independently verified to meet strict UK standards for quality, safety and responsible manufacturing.
ProShield® Treatment - Endorsed by Allergy UK - Independently endorsed by Allergy UK, confirming the anti-allergen treatment meets recognised standards for reducing allergen exposure.
The Holst delivers a versatile medium feel with genuine bounce-back comfort from its Pillow Top and ComfortCore™ layer - all backed by Sealy's patented AlignSupport™ Coil technology. If you want reliable support with natural cooling and allergen protection, this is well worth a closer look.
Choosing a mattress online takes trust. That's why the Holst comes with a 100 night comfort guarantee - if it doesn't feel right, we'll exchange it. View the full mattress trial policy.
Not sure which Sealy mattress is right for you? See our Mattress Buying Guide for expert guidance on mattress types, fillings 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.
Perfecting their craft since 1881, Sealy is now one of the UK’s leading bed brands. Renowned for their commitment to quality, comfort, and support, Sealy works with a team of international orthopaedic surgeons, biomechanical engineers, and medical scientists to ensure all products create a fantastic night’s sleep.
At Land of Beds, we are proud to be able to offer our customers high-quality, luxurious products that are affordable and accessible to all consumers. Our relationship with Sealy dates back many years. Our independent customer reviews rate Sealy products 4.7 out of 5, giving us the confidence to provide Sealy with our seal of approval and our customers' valuable insight when making informed purchasing decisions.
Many prestigious organisations have endorsed Sealy products, including Which, the British Allergy Foundation, BSI, and the Carbon Neutral organisation. Sealy is considered a high-quality, reputable firm by both suppliers and customers, and its products come with an extended guarantee.
Lovely and firm and am enjoying very good nights sleep
read moreIs this mattress suitable for a slatted base?
Yes, this mattress is suitable for a slatted base as long as your slats are in good condition and no further apart than 7.5cm.
Do I need to turn this mattress?
This is an easycare mattress, which means you do not need to turn the mattress over, however you should rotate from head to toe on a regular basis to ensure even use.
Is this mattress suitable for a front sleeper?
Yes, this mattress is a medium tension and suitable for front sleepers.
How long will this mattress last?
This mattress is guaranteed for 7 years.
Can I sleep on this mattress straight away?
Yes, you can sleep on your mattress straight away.
What is the depth of this mattress?
This mattress is 30cm deep.
Does this mattress have an odour?
As with all mattresses, there may be a slight smell when first opened. We liken this to a new car smell, which is non-harmful and will disappear within a few hours.
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
