Best King Size Mattress under £400

 

Finding the best king size mattress under £400 can be a challenging task – particularly on a lower budget. Most king size mattresses tend to go over £400, easily – and can reach £1000 and m...ore. For people with an average income, that price is not entirely reasonable. Hence, this helpful king size mattress buying guide – in this best king size mattress under £400 buying guide we bring you the top 5 king size mattress models below £400. A selection of quality king size mattresses from well known UK mattress brands such as Silentnight, Happy Beds, and AirSprung. Read on!

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Top Listed Best King Size Mattress under £400 of March 2024

Product Information Our Verdict Price
#1
Silentnight Miracoil King Size Mattress
Additional Information
  • Type: Pocket Mattress
  • Firmness: Firm
  • Features: Hypoallergenic, Made in the UK, Zones Spring Support, Eco Comfort Fibers, Hand made in the UK
  • Packing: Flat, full size mattress
  • Weight: 55 Kg
  • Certification: This product is suitable and tested for domestic use only to BS7177 Low Hazard requirements
  • Warranty: 5 years
Pros

Great support thanks to the popular Mirapocket spring system. The filling is hypoallergenic and highly breathable. Zoned support for perfect spinal alignment. Quilted cover that offers a luxury finish added comfort. Made with sustainable Eco Comfort fibres.

Cons

Mattress is not turntable, one sleeping side only. It may take a little while to it, due to being a firm mattress

Made in the UK by Silentnight, this firm mattress is a good choice. Thanks to its zoned spring support, luxury sleeping surface and eco comfort fibres this mattress offers adequate support as well as comfort.

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#2
Inofia Latex Memory Foam Sprung King Mattress
Additional Information
  • Type: Hybrid, Memory Foam, Springs, Foam
  • Firmness: Medium Firm
  • Features: Bi-density Latex Technology, Breathable and Skin-Friendly Top Layer, Ergonomic support and adaptability for a Perfect Comfort
  • Packing: Vacuum packed, rolled up
  • Weight: 35 kg
  • Certification: Meets all UK Fire Regulations, OEKO-TEX Certified
  • Warranty: 10 years
Pros

With a high resilience latex foam core, the double density system and memory foam provides some serious comfort. With excellent airflow it ensure the mattress is highly breathable discouraging moisture and heat build up. With Zero motion transfer and the flexible latex, it prevents back problems.

Cons

Not many negatives with this mattress model

A lovely hybrid mattress model from Inofia. Using a combination of memory foam, latex and pocket springs this mattress offers amazing comfort. With excellent ventilation this mattress is highly breathable ensuring a fresh night sleep every night.

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#3
Happy Beds Cashmere 3000 Sprung Memory Reflex Foam
Additional Information
  • Type: Pocket Sprung, Memory Foam
  • Firmness: Medium Firm
  • Features: Orthopaedic mattress with a 3000 individually sprung pocket spring system, Cashmere fabric, hypoallergenic
  • Packing: Flat, full size mattress
  • Weight: 31 Kg
  • Certification: Meets all UK Fire Regulations
  • Warranty: 12 months
Pros

3000 individually wrapped pocket springs offer you unparalleled support and comfort as well as no motion transfer. Cashemere fabric covers the sleeping surface. Made with layers of memory foam and reflex foam that contour your body shape, relieving pressure. Tufted for increased durability.

Cons

This is a fairly heavy mattress. Some may consider this to too firm

A quality 3000 pocket springs mattress from well known UK mattress brand, Happy Beds. A combination of memory foam and pocket springs offers adequate support and comfort. Tufted with hand stitched handles the mattress is easy to move and rotate every 6 weeks.

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#4
Vesgantti Lavender 5FT King Size Mattress
Additional Information
  • Type: Pocket Sprung Memory Foam Mattress
  • Firmness: Medium Firm
  • Features: 3 zoned lavender stretch knit cover, Contouring & Comfortable, Responsive & Isolative, Ventilated Mesh Border, 25 cm Thick Mattress
  • Packing: Rolled, mattress in a box
  • Weight: 34 Kg
  • Certification: Meets all UK Fire Regulations, CertiPUR-US
  • Warranty: 10 years
Pros

This popular model from Vesgantti uses CertiPUR-US Certified foam. Made using individually wrapped pocket springs and memory foam creates a mattress that offers medium firm support perfect for back sleepers. No motion transfer, absorbs noise, allows air to circulate and distributes body heat away.

Cons

There are no side handles; the mattress has only 1 sleeping side

Vesgantti does it again; a lovely memory foam with pocket springs mattress that comes with a 10 year warranty. It absorbs noise, no motion transfer, allows for superior airflow, and dissipates heat away from you body.

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#5
Fairyland King Mattress Memory Foam Pocket Sprung
Additional Information
  • Type: Memory Foam Pocket Sprung
  • Firmness: Firm
  • Features: Breathable Bamboo Fiber fabric, High-density Foam Layer, Motion Isolation
  • Packing: Rolled up, mattress in a box
  • Weight: 28.8 Kg
  • Certification: This product is suitable and tested for domestic use only to BS7177 Low Hazard requirements
  • Warranty: 10 years
Pros

Another UK made model from Fairyland, made using memory foam and pocket springs. Controls motions to prevent localized bounce this mattress is designed for common sleeping problems such as tossing and turning, partner moving, all of this won’t apply with this mattress.

Cons

On unpacking is might smell, this is common with new mattresses

Fairyland, another UK based mattress brand offers this 3 layer mattress; memory foam, double high density foam layer and a layer of pocket springs alongside the Bamboo fibre fabric that covers this king size mattress. Deodorizing and antibacterial, while ensuring cool and transparent summer, fluffy and comfortable in winter.

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Top King Size Mattresses under £400

1. Silentnight Miracoil King Size Mattress

Silentnight Miracoil King Size Mattress

This Silentnight Miracoil king size mattress, under £400 is a great rest for an affordable price. With a supportive layer of coils that are specially made for this type of mattress, the Miracoil system is unavailable anywhere else, and they are created to offer varying levels = of support based upon the different zones in the mattress and how much support each area of the body requires. This set of coils is topped with a layer of comfort fibre on top to increase the cushioning value and ease the pressure points and all that is topped with a quilted portion.

  • This mattress has a spring system that not only offers double the springs of other mattresses but also reaches all the way to the edges of the mattress, making the entire surface area useable for sleeping and stopping the sides from sagging before the rest o the mattress shows wear. The interlinked coils will offer firm support for the entire length and width of the mattress, making it a great choice for back sleepers and those with back pain. The support helps to align the spine and lower the back pain felt daily. These are also created to move silently and not disturb the sleeper with unnecessary noise and disruption as you settle in for a night of rest or waking you as you move during the night. Receive increased support for head and neck while allowing less support for the ankles and feet, no pressure points for the joints, support across the mattress to allow the spine to remain aligned by being supported differently depending on what is required. Hips will be allowed to sink lower while knees will be supported higher and the head kept level across the neck and shoulders.
  • A layer of eco comfort fibre is topping the coils, after a protective layer, that allows for air to flow and keep it cool and dry but doing so without causing any added harm to the environment. This layer of comfort welcomes you to bed and softens the support across all pressure points reducing the pain in joints and muscles. Added to this layer is a quilted top. The quilting prevents the cushion top from shifting ensuring it remains a cushion top on the entire surface of the mattress and for years to come.
  • Your new mattress is made to British standards and subjected to multi-stage testing to ensure durability along with support. Delivered right to your door and ready for use the same night it arrives, support your local decades-old business while protecting our environment. With the strictest safety and health measures, all details are intended to increase the length of the life span of your mattress and ensure value for money with years of use and comfort. With a full twenty-one centimeters of height and full-size options up to king, this best king size mattress under £400 is a great choice for anyone with back pain or who needs firm support to ease their pain or increase their sleeping hours.

2. Inofia Latex Memory Foam Sprung King Mattress

Inofia Latex Memory Foam Sprung King Mattress

For a great king size mattress under £400, the Inofia Latex Memory Foam Sprung Mattress is a good choice. This mattress has pocket springs that are organized in pressure zones so each area of the mattress is specially created to support each section of the body in the way that is most comfortable. Some areas are firmer while others are softer and sink further into the mattress. The added layers of memory foam add cushiony support that is both welcoming and helps lower pain for anyone who sleeps on it, and the pocket springs individually wrapped allow them to move independently of each other so anyone else in the bed doesn’t create a disturbance.

  • Pocket sprung mattresses offer firmer support then others can, and the springs are each wrapped on their own so it doesn’t move the entire mattress when one person is moving or unable to sleep. This provides uninterrupted sleep for everyone, as even when we move around ourselves it can interrupt the mattress in a way that bothers our own sleep as well. The springs are created in different firmness so the body can be comfortable and properly aligned throughout the entire mattress making a comfortable sleep and lower body aches and pains. This can help especially with back pain, while the layers of memory foam will cradle the body and cushion the joints.
  • Memory foam covers the pocket sprints on this mattress so there are no pressure points felt from the top of any of the coils. The body sinks into the top layers of foam to be supported by the higher density foam inner layers and the coils in the base. With no pressure points to cause pain, the body rests comfortably and you wake well-rested and pain-free.
  • The top layer is created with increased breathability to keep you cool and comfortable at night, keeping the mattress at a comfortable temperature. A layer of mesh is designed to keep moisture and heat build-up from around the body and the hypoallergenic material lowers the risk of any reactions and helps maintain an allergen-free rest.
  • For easy delivery and set up your mattress arrives vacuum-sealed in plastic and rolled into a box. It simply needs to be opened and unrolled, then left to return to its natural height and shape, this can take as little as eight hours for a comfortable sleep but can take up to three days to fully reach it’s expected size. This easy set up removes the need for delivery people being in the home, reduces the difficulty of moving the mattress yourself, the box is small and manageable even for one person, and is environmentally friendly in both packaging and shipping needs.

3. Happy Beds Cashmere 3000 Sprung Memory Reflex Foam

Happy Beds Cashmere 3000 Sprung Memory Reflex Foam

The cashmere fabric on this mattress sets it apart from all other mattresses and makes it a top choice for the top king size mattresses under £400. For a soft and cozy rest while supported by a layer of memory foam for comfort over a base of 3,000 pocket springs that move individually to avoid disturbing anyone else. All the important details are well cared for and a tufted construction is used for strength, with handles along the sides included making rotation easy to complete. With no-flip construction, there is no need to ever flip the mattress to ensure it maintains the thickness and avoids dips and dents, but it only requires rotation every month.

  • The strength of cashmere will add years to the life span of your mattress whole keeping you warm in the winter and cozy year-round. As a soft-top, no other fabric can meet its comfort nor create such a welcoming warmth at the end of the day. As you are surrounded by this cushion top the memory foam layers beneath will provide both support and cushion the pressure points that may be formed by the pocket coils that are beneath. The tufted construction increases the strength of the mattress and ensures it holds its shape for months and years to come. Created not only for comfort but also for lasting durability and pain-relieving measures have been taken to remove pressure points and the misalignment and pain they can cause.
  • The many pocket coils that make up the base of this mattress offer support for the entire body and move with the body as you shift throughout the night. For proper support they are not interconnected so each part of the body receives equal support without any transfer of movement between the springs, allowing that support to remain intact even during movement or shifting. These coils are covered with a memory foam layer that cushions the pressure points and creates another layer of comfort. The body is allowed to sink into this layer and be cradled through the night and forms even support across all the coils.
  • For added ease, this no-flip mattress is built with handles along the side for rotation and is tufted for both comfort and durability. The dual layers of reflex foam and memory foam return to their natural height every day after use, and the combination creates both support and comfort while avoiding wear and weak spots. By rotating the mattress regularly longevity is improved and dents will not be formed in the foam. To ensure the level of care and detail is recreated in each mattress they are hand made and all details are made with great attention paid.

4. Vesgantti Lavender 5FT King Size Mattress

Vesgantti Lavender 5FT King Size Mattress

The Vesgantti Lavender King size mattress is a wonderful mattress for under £400. It offers comfort, support, breathability, a soft to the touch welcoming top layer, and is both antibacterial and antistatic to offer a full range of comforts in one mattress. Ease your aches and pains with the support of individually wrapped and cushioned coils in the base covered with layers of memory foams to ease the pressure points and keep the body aligned and supported evenly throughout.

  • Each coil within the base is wrapped individually which allows them to adjust independent of each other and keep the movements limited to the area that is moving directly, leaving your partner undisturbed. The coils are surrounded by a breathable outer material that allows airflow to continue throughout the mattress and allowing the temperature of the mattress to remain cool even during a warm summer night. The sections of the coils are created to adapt to the shape of the body, offering more support where needed and less where comfort matters most, sections include the head, neck, shoulder, breast, waist, hip, and leg, and the responsive coils keep the spine aligned and the joints properly supported.
  • The multiple layers of memory foam are created in a way that some offer added support while others increase the comfort, with a top layer that allows the body to sink into the mattress and rest easily on the cushioned foam. Comfort layers are created to cradle the body while you sleep and keep the pressure point minimalized and the comfort maximized. Dense memory foam layers provide added support with bonus layers of softer foam for the comfort, sink into the bed feeling. Layered in a way that denser and more supportive foam is present in the areas that most need support and cushioned in others these layers provide all the best factors of each type of memory foam used to build a mattress that will help support and align your spine while removing built-up pressure points on the joints and helping your body to not only get the rest it needs but to do so in a way that protects the body from wear during sleep.
  • Avoid the hassle of traditional mattress delivery with this vacuum-sealed packaging system. Your mattress comes sealed in plastic and rolled to fit in a box, easily moved by one person. Unwrap and unroll your mattress to see it begin returning to its natural height and size immediately, and fully expanded within seventy-two hours. Your mattress is ready to sleep on in as little as eight hours and comes with no special delivery needs and just one box and one piece of plastic to recycle.
  • The top cover for his mattress has a beautiful lavender on it and is made from soft, breathable material that whisks away sweat to keep your bed clean and dry all night every night. Rest easy knowing the antibacterial properties will help avoid illness and allergens, while also preventing the mattress from developing any unpleasant smells or build-up of sweat and that bacteria found within it.

5. Fairyland King Mattress Memory Foam Pocket Sprung

Fairyland King Mattress Memory Foam Pocket Sprung

Ease your sore back and joints with this kind size memory foam pocket sprung mattress. The base built with individually wrapped coils offers the support to keep your spine aligned and supported while the multiple layers of memory foam add to the support for the joints along with adding layers of comfort to cradle the body and ease the pain of sore joints. The cover of soft bamboo is breathable and wonderfully comfortable to sleep on while also being antibacterial and protecting from dust mites.

  • The pocket springs make the transfer of movement from one side of the bed to the other almost none, so one person moving at night doesn’t bother the other, resulting in better sleep and not waking each other up. This is even more important for those with body pain, as they are more likely to be adjusting position and tossing and turning all night to find a comfortable position, but the support from the pocket coils and the comfort of memory foam makes that easier to do.
  • With less interrupted sleep overnight you wake well-rested and comfortable. Both partners get a good night’s sleep on this mattress without waking each other and moving around less. The high elasticity layer of foam offers gentle support and moves with the body to create even comfort, while the high-density foam makes sure the mattress doesn’t sag in spots and create discomfort. The two layers of high-density foam keep their shape night after night.
  • Fight allergies and illness with the antibacterial and anti-dust mite protection from the bamboo cover, it kills the viral bacteria that can spread the common cold or other illness from person to person, or keep reinfecting you if you get sick. It will also reduce the allergies that can rest in a bed and cause symptoms overnight. This is helpful for anyone with asthma or spring allergies, the allergens won’t gather in the bed or on the mattress and keep out the irritants so sleep is healthier and less interrupted. A good night’s sleep can help fight off illness and maintain health, making this a good mattress for those who want a healthy lifestyle and comfortable rest.
  •      This mattress is a good choice for the best king size mattress under £400 as it offers support while bringing comfort, lowering the sleep disturbances, and providing a healthy and supported night sleep. It will maintain its original shape and thickness night after night with the high-density foam but also cradle the body with the gentle comfort of the bamboo top layer. The sterile fabric layer helps any bacteria or allergens from taking home in the mattress and the bamboo helps to kill bacteria and keep your bed clean, safe, and healthy.

Advantages of a UK King Size Mattress

Not convinced why you should buy a king size mattress under £400 as opposed to a twin-sized model (or two of them placed alongside)? Well, here are a few advantages of why a king size mattress is a good choice:

  • You have more space: How many times have you slept uncomfortably throughout the night, simply because you felt like you did not have the space necessary? Well, the best king size mattress under £400 should give you the space that you need.
  • You get luxury: Aside from receiving comfort, you also receive luxury. If you go for a thicker king size mattress and bed, then you would get the feeling you typically experience in a luxury hotel.
  • There are many choices for you: Regardless of the type of mattress that you choose, you can be certain that it will almost always come in king size as well.

A king size mattress is a convenient choice overall, thanks to its size, it makes this mattress size a suitable choice for any type of sleeper.

Things to Consider When Shopping for the Best King Size Mattress Under £400

When you are looking for the best king size mattress under £400, there are several aspects that you might first want to keep in mind. These aspects include:

Firmness Level

How do you generally prefer to sleep at night, position-wise? If you are a back or stomach sleeper, then you might want to choose a firmer mattress. On the other hand, if you are a side sleeper, you should choose a medium firmness mattress model, as it will not put your body under as much pressure.

Materials and Layers

Do you want your best king size mattress under £400 size to be more supportive, or are you more concerned with the comfort level? Generally speaking, if the emphasis is placed on the springs, then the mattress will be much firmer. On the other hand, if the focus is mostly placed on the foam, there’s a chance the mattress will feel a bit softer. You just need to determine what your needs are, what type of sleeper are you, side sleeper, back sleeper, do you suffer from back pain? If so, a medium-firm mattress is more suitable for those suffering from back pain.

Type of Foam

If you have determined that a foam mattress is what you are after, now you have to think about what kind of foam do you want. Polyfoam is cheaper and supportive, whereas convoluted foam is an excellent choice for heat dissipation. However, many people nowadays prefer memory foam thanks to its ability to contour around your body.

Warranty

The last thing you want is to pay money on a cheap poor quality mattress, only to find out that it’s no longer any good after a short period of time. This is why you need to look for a king size mattress with an excellent warranty. The average mattress features a 2-5 year manufacturers warranty, but some manufacturers provide even more excellent coverage, up to 10 years, look for mattress brands such as Naturalex or Inofia Mattresses.

Final Thoughts

You can buy the best king size mattress under £400; you just need to make sure that you are looking at the right features, and that you read as many reviews as possible. The key to being comfortable at night is to do your research and find the best king size mattress for you.