Give both sleepers more room to stretch out with a 180 x 200cm super king memory foam mattress. Enjoy close, cushioned support and less disturbance from partner movement, with free next day delivery available on in-stock options.
Easy to select the mattress I wanted; it was delivered promptly and in good condition. Its a good quality product and I would use this company again.
They attempted to deliver a mattress that was to big to go up my stairs my mistake didn't account for the fact it wouldn't bend. They took it back then advised me on the best one to have. Within 24 hrs I had a diffrent one delivered and the delivery guys took it up stairs for me no extra charges . Customer service was great
Fair prices. Amazing delivery. Punctual, polite and efficient staff. Good quality products. Very comfortable bed
Fantastic overall experience from ordering to delivery im very impressed not a lot of firms like this anymore thankyou very much
Easy accessible website, easy to order and great communication. Delivery service was good and item as described. Very comfortable and affordable.
Easy to order, found what I was looking for quickly, email verifying my order, and further emails telling me about delivery, was sent email today stating time of delivery with a code, to give delivery driver only if I was satisfied with the service, appears to be very well organised and if delivery goes well tomorrow then I would say it is an excellent service. Delivery came on time, constant updates as to where you are in line for your delivery, I would certainly use again.
Next day delivery of new mattress as promised, swift & efficient service.Very comfortable, firmness level just right, went for medium firm rather than previous firm. Helping ease hip pain already after only a few days
Fantastic service, mattress is of good quality and delivery was very timely. Lovely deliverer man insisted on carrying the mattress to my entrance hall even when I said it was ok to leave at door . It was kindness.
Good communication and delivery arrived before the allotted time which was great . Excellent mattress I would highly recommend
I am so glad I bought this product. My mattress was well over 20 years old and causing me pain. The quiz for the perfect mattress is great. It was such good value for money and comfort I bought another for our spare room. We are due to move home and will need further mattresses for guests and grandchildren so I will definitely buy from this company again excellent value for money, quality and quick delivery and excellent customer service.
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A super king memory foam mattress gives you a generous 6ft-wide sleeping surface, making it ideal for couples who want more room to stretch out.
Memory foam gently contours to your body and distributes pressure evenly, helping you settle into a comfortable sleeping position. It also absorbs movement, so you’re less likely to be disturbed when your partner turns over during the night.
A super king mattress is a real bedroom upgrade, giving couples more space to settle into their preferred sleeping positions.
Start by choosing the feel you both enjoy, then compare cooling features, edge support, mattress construction and guarantees. Use the filters to narrow the range and shop options that match your priorities and budget.
Firmness | Best suited to | What it feels like | What to choose |
Lighter sleepers and couples who mainly sleep on their sides | Deep cushioning with more sink around the shoulders and hips | Choose this if you both enjoy a plush, body-hugging memory foam feel | |
Side sleepers, combination sleepers and couples with similar comfort preferences | Cushioned and supportive, with enough give to enjoy the contouring foam | A versatile choice if you want noticeable memory foam comfort without sinking too deeply | |
Back sleepers, combination sleepers and couples with different body weights | Steadier support with gentler contouring around the body | Choose this for a more balanced feel, especially if one partner prefers firmer support | |
Front sleepers, heavier sleepers and anyone who prefers to stay closer to the surface | Less sink with a more supportive, stable finish | Look for firm memory foam if you want close support without a deeply cushioned feel |
Next day delivery - Available on eligible in-stock mattresses across the UK mainland.
Lowest price promise - Compare super king memory foam mattresses with added price reassurance.
Old mattress removal - Arrange collection for the day your new mattress arrives.
Excellent reviews - See what other customers say before making your choice.
Award-winning retailer - Buy from a three-time NBF Online Bed Retailer of the Year.
British-designed quality - Explore British-designed mattresses made using carefully chosen materials.
Share how you sleep, your preferred firmness and your budget. MattressFinder™ will quickly shortlist suitable options from the range. Find your perfect mattress.
A super king memory foam mattress earns its place in a larger main bedroom, giving couples a more indulgent amount of space, alongside the cushioned comfort memory foam is known for.
Choose one if:
You want more room to stretch out without crowding your partner
One of you turns over frequently or gets in and out of bed during the night
You’d like movement to stay more contained on each side of the mattress
You sleep on your side and enjoy cushioning around your shoulders and hips
You’re ready to upgrade from a double or king size mattress
Our super king memory foam mattresses feature reinforced edge support, so you can both spread out or sleep close to the edge. A stronger perimeter helps the mattress feel steadier near the edge and allows you to make better use of the full 180cm width.
Before ordering, measure your room and leave enough space to open wardrobes, use bedside furniture and walk comfortably around the bed.
Love the cushioned feel of memory foam, but concerned about warmth? Compare the cooling features built into each mattress before you buy.
Traditional memory foam creates a close, body-hugging feel, which can feel warmer for some sleepers. Newer foam constructions offer alternatives that retain the cushioning while encouraging a fresher sleep surface.
Look for:
Cooling gel foam, which adds temperature-managing materials to the comfort layer
Open-cell memory foam, which has a more breathable internal structure
Breathable covers, which allow heat and moisture to move away from the surface
Hybrid construction, where the spring core creates more room for air to circulate
Less sink-in firmness levels, which keep more of your body closer to the surface
Choose standard memory foam if you love a deeper, enveloping feel and don’t usually sleep warm. Cooling foam or a hybrid mattress could be the better buy if you want contouring comfort with a fresher, more responsive finish.
Free next-day delivery to most locations - Need your new mattress quickly? Free next-day delivery is available to most UK mainland locations on eligible in-stock super king memory foam mattresses.
Free weekend delivery - Select a weekend delivery slot, if available, and arrange for your mattress to arrive when it suits you.
Choose a delivery date - Choose your preferred date at checkout and plan delivery around work, a house move or replacing your current mattress.
Just £39 to responsibly dispose of your old mattress - Add the removal service at checkout and we’ll collect your old mattress when MattressNextDay delivers your new one.
100% of your mattress is reused and recycled - Your mattress is separated into its core components so the raw materials can be repurposed. This means 100% of the mattress is transformed into new products instead of going to landfill.
A greener way to get rid of your old mattress - Save yourself the trouble of organising disposal with a practical recycling service designed to fit around your mattress delivery.
Ready to find a mattress that suits your space and budget? Browse the latest MattressNextDay sale and compare offers across trusted brands, popular sizes and a choice of comfort grades. Shop mattress sale.
Choosing a mattress is easier when you know what to compare. Our product experts answer common questions about super king memory foam mattresses, including size, spring count, children’s beds, guest rooms and delivery.
Martin Seeley, Product Expert at MattressNextDay, answers questions about super king memory foam mattresses.
As a super king memory foam mattress measures 180cm wide by 200cm long, it gives each person around 90cm of sleeping width (the same width as a standard single mattress).
You can stretch out, turn over and settle into your own side without regularly meeting your partner in the middle.
Memory foam responds to heat and pressure, gently moulding around the body as you lie down. This creates close cushioning around areas such as the shoulders and hips, with deeper support layers helping the mattress feel stable underneath.
Choose reinforced edges if you want to use as much of the super king surface as possible. Denser foam or additional support around the perimeter helps the sides feel steadier when you lie or sit near the edge.
Strong edge support is especially valuable for couples who spread out, sleepers who find themselves close to the side and anyone who regularly sits on the mattress while getting ready.
A sturdy divan, solid platform base, or compatible 180 x 200cm bed frame will give a super king memory foam mattress the support it needs. If you’re using slats, choose a frame with strong, closely spaced slats and solid central support across the full width of the bed.
Avoid weak or widely spaced slats, as these can leave parts of the foam unsupported and may lead to uneven wear or sagging over time. Always check the mattress manufacturer’s guidance on slat spacing and base compatibility before you order.
The size itself won’t make the mattress feel warmer, though some traditional memory foam mattresses can retain more heat because they contour closely to the body.
Choose cooling gel, open-cell foam, a breathable cover or a hybrid spring core if you prefer a fresher feel. Product descriptions will explain how each mattress manages airflow and warmth, making it easier to compare your options.
Most rolled memory foam mattresses take around 24 to 72 hours to reach their full shape, although many are ready to sleep on sooner. Expansion time can vary by brand, mattress depth and room temperature, so always follow the instructions supplied with your mattress.
Unwrap it as soon as possible, place it flat on the correct bed base and give it plenty of space to expand. A warmer room can also help the foam regain its shape more quickly.
A super king memory foam mattress is the biggest in our range, wider and longer than a double, and 30cm wider than a king size.
Mattress size | Dimensions | Good for |
135cm x 190cm | Smaller rooms, guest rooms and solo sleepers | |
150cm x 200cm | Couples, taller sleepers and main bedrooms | |
180cm x 200cm | Larger rooms and maximum shared space |
At MattressNextDay, super king memory foam mattresses come in a range of prices, so there’s something for everyone.
At the lower end of the range, you can find straightforward memory foam comfort in a generous size. Spending more can give you added features such as:
Deeper memory foam layers for a more cushioned, body-contouring feel
Cooling gel or open-cell foam for a fresher sleep surface
Hybrid support systems for extra responsiveness and easier movement
Breathable or removable covers for simpler care
Compare what each mattress includes rather than choosing by depth or price alone. A higher price should bring features that matter to your sleep.
*Delivery charges may apply for some areas. Please see our delivery page for more information.
1. Order by 6pm for next day delivery between Monday-Friday, 12pm on Saturday and 3pm on Sunday. The 'Order by' time may be subject to change dependant on our delivery partners.
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