Pure Foam King Size Mattresses Under £150

Kingsize (5'), 20cm

This Iyer nature gel memory foam mattress is designed with a double-layer all-foam system, improving support and heat dissipation, The mattress layers include a 2cm certified gel memory foam layer and 18cm of high-density base support foam for ultimate comfort. It includes a soft hypoallergenic cover layer that is washable for your convenience. All-foam bed design combines expertise and the best materials with advanced sleep technology. Memory foam is conducive to continuous airflow and breathable; skin-friendly fabrics adapt to the environment to keep the mattress surface at the ideal sleeping temperature; Buoyant, no-sink support foams adapt and conform to your body for optimal pressure relief. Specialized foams reduce motion transfer of a partner so your sleep is undisturbed. This mattress is compressed and packaged in a box for shipping, allowing it to easily be delivered to your door and expand to its full lofty shape inside your home. They fit all frames, such as box springs, floor, slatted base, flat platform or adjustable bed, and hospital bed. Note: Please allow up to 72 hours for the mattress to fully expand and for any potential odors to dissipate.

Lovely mattress, no smell and expanded quite quickly, waited the 48 hours before putting on the bed. Anonymous. Crawley, GB. Wed Aug 26 2026

150 x 200cm

Look forward to going to sleep quicker and staying asleep longer on this mattress. It will support the body's sleeping position every night. It combines the excellent support and comfort of the pressure-relieving layer of responsive individually wrapped material to provide a superior level of luxury and relaxation.

Great mattress at a great price! Very comfortable ). Cari. Sun Jul 12 2026

Kingsize (5')

Introducing the majestic 26cm Mattress, a true masterpiece of comfort and support, elegantly packaged in a convenient box. Crafted with precision, this medium firm mattress combines the best of both worlds - the classic reliability of a pocket coil design and the innovative technology of a hybrid innerspring mattress.

Very comfortable and soft! No complaints from me. Josh. Thu Jul 30 2026

Kingsize (5'), 20cm

Experience the perfect balance of plush comfort and lasting support with this gel memory foam mattress. Designed for all-night relaxation, its dual-layer construction combines a cooling gel-infused memory foam top layer to dissipate mattress heat and relieve body pressure points, paired with a high-density base foam to ensure decade-long durability. Ideal for all sleeping positions—back, side, or stomach—this mattress maintains a cool, sweat-free sleep surface night after night. Shipped conveniently in a compact box, it’s effortless to set up: simply unbox, unroll, and let it expand. Wake up refreshed with breathable comfort that adapts to your body while delivering unwavering support. No fuss, just rest.

Good quality. It was easy to get out of box and packaging. It soon reinflated after being compressed and is a good size and good quality.. Deborah. Grantham, Lincolnshire, GB. Wed Aug 05 2026

Kingsize (5')

The 27cm Hybrid Sleep System represents the pinnacle of mattress innovation, delivering uncompromising comfort in an ingeniously compact form. Our sleep specialists have perfected the equilibrium between responsive pocket spring precision and modern hybrid support, creating a medium-firm sleep experience that actively adapts to your body's needs. Shipped in a space-saving box for convenience, it transforms into a premium sleep surface that elevates your nightly rest through thoughtful engineering and premium materials.

Lovely mattress , took sometime to fully expand. Very comfy, hope it lasts for years to come. Anonymous. Sun Aug 16 2026

King (5')

Get a better night's sleep without spending a fortune. This 20cm foam mattress is designed for real life – whether you're upgrading your main bedroom, furnishing a guest room, setting up a child's room, or kitting out a rental flat. Available in four practical sizes: Single, Small Double (4'), Double (4'6"), and King (5'). The Single size also a great fit for caravans, campervans, and sofa beds, giving you a comfortable sleep surface wherever you need it. It combines a soft gel memory foam top layer with a firm high-density foam base, offering the right balance of comfort and support. Breathable, hypoallergenic, and easy to set up, it's a simple upgrade for better rest.

so perfect and comfortable, easy to unbox and arrived quickly! Thinking of getting another one for myself now. Anonymous. Mon Mar 23 2026

Kingsize (5')

Get the perfect balance of comfort, support, and affordability with our premium memory foam mattress, designed to deliver restorative sleep without breaking the bank. Crafted with body-hugging memory foam, this medium-firm mattress contours to your shape, providing ergonomic support that helps you wake up feeling refreshed. Infused with green tea and active charcoal, this mattress actively combats odours and moisture, keeping your bed feeling fresh night after night. The breathable knitted cover enhances airflow, ensuring a cooler, more comfortable sleep experience. Certified by OEKO-TEX® and CertiPUR-US®, it meets the highest safety and environmental standards, so you can rest easy knowing it’s free from harmful chemicals. For ultimate convenience, this mattress arrives compressed and rolled in a compact box—simply unbox, unroll, and watch it expand to its full shape within 72 hours. Backed by a 10-year limited warranty, it's an ideal choice for guest rooms, spare bedrooms, or everyday use.

Good quality, comfortable to sleep on. Thank you. Patrycja. Coventry, GB. Thu Apr 23 2026

Kingsize (5')

Individual pocket springs: supported by hundreds of quality and stainless individual pocket springs, each sprung works independently to offer all-over and average support to 7 parts of your body (feet, legs, hips, waist, shoulders, neck, head). Excellent shock absorption and resilience, cater to your vertebra well and help adjust and correct your sleeping posture. Support system: The ergonomic design hybrid-pocket memory foam and pocket sprung support system not only provides better support for your body but also can absorb more pressure that comes from your body and the sprung, providing more buffers for your body. Fully relax your muscles, and greatly improve your sleeping quality. Breathable and healthy: designed with hybrid-pocket memory foam, comfortable and breathable, providing good air circulation to let go of body sweat and moisture to keep the body comfortable and dry when sleeping. Back pain relief & motion isolation: the puffy mattress single features a plush, soft surface that leaves you floating on a cloud, and the bottom offers medium-firm mattress support. Perfectly shape your body. Say goodbye to back pain. Plus this hybrid-pocket memory mattress eliminates motion transfer and controls motion to prevent localized bounce, so you can sleep through your partner's tossing and turning and wake up refreshed. The mattress is great for all sleeping positions. Easy shipping & set-up: the mattress is compressed and packaged in a box for shipping, allowing it to easily be delivered to your door and expand to its full lofty shape inside your home. They fit all frames, such as box sprung, floor, slatted base, flat platform or adjustable bed, and hospital bed. "Individual pocket springs".

Fast delivery and as described - very pleased we purchased this mattress! It’s comfortable and good quality. Anonymous. Wed Aug 12 2026

Kingsize (5')

Giving you the perfect blend of comfort and support without the need for a thicker mattress, the Reflex Core mattress delivers on quality and affordability. Available in Single, Small Double, Double and King sizes. Topped with a layer of responsive memory foam on a base of reflex foam, all encased in a hypoallergenic Tencel cover, the mattress is 15cm deep with a medium firm comfort level that’s suited to all sleepers, no matter your position, making it an ideal choice for guest beds or children’s rooms. Especially designed to reduce roll-together through minimised movement transfer, this mattress is great for couples, and since there are no springs, the noise-free sleep experience helps to reduce waking periods, giving you a more restful night.

Good quality and great value for money. Rachel. Hucknall Nottingham, GB. Sun Jun 07 2026

King (5')

Experience restful sleep with this 25cm thick pocket spring mattress, designed for those who value comfort and support. Each individually wrapped spring works independently, contouring precisely to your body's shape and offering targeted support while effectively reducing motion transfer – so you can enjoy undisturbed slumber even if your partner moves during the night. Encased in a soft, breathable fabric cover, this mattress enhances air circulation to help regulate temperature throughout the night. The 25cm profile features multiple layers of high-density foam in addition to the individual springs, creating a balanced feel between plushness and firmness to keep your spine properly aligned and relieve pressure on shoulders, hips and lower back. Fully compliant with UK safety regulations, free from harmful substances and hypoallergenic – suitable for the whole family. Available in Single(90x190cm), Small Double(120x190cm), Double(135x190cm) and King(150x200cm) sizes.

Feels firmer than I expected but still great quality. Anonymous. Tue Jul 21 2026

Kingsize (5')

Giving you the perfect blend of comfort and support without the need for a thicker mattress, the 12cm deep Reflex delivers on quality and affordability. Available in Shorty, Small Single, Single, Small Double, Double and King sizes. Topped with a layer of responsive memory foam on a base of reflex foam, all encased in a hypoallergenic Tencel cover, the medium firm comfort level is suited to all sleepers, no matter your position, making it a great choice for guest beds or children’s rooms. The slim profile is also ideal for bunk beds, holiday homes, and caravans. Especially designed to reduce roll-together through minimised movement transfer, this mattress is perfect for couples, and since there are no springs, the noise-free sleep experience helps to reduce waking periods, giving you a more restful night.

Comfy and great for my little boy. Not as thick as I was expecting and if you are slightly heavier then maybe not the best. Gabrielle. Willerby Hull, GB. Tue Dec 16 2025

King, 20cm

Experience the perfect blend of comfort and coolness with our sponge mattresses. Crafted for ultimate relaxation, these mattresses offer a plush comfort that contours to your body, ensuring a restful night's sleep. The cover is designed with a cool-to-touch fabric, providing instant relief from the heat and promoting a refreshing sleep environment. Beneath the surface, a supportive structure cradles your body, reducing pressure points and aligning your spine for a healthy sleep posture. We've put your needs first, creating a mattress that's not just comfortable but also thoughtfully designed for a better night's sleep. With our commitment to quality and your satisfaction, you can rest easy knowing you've chosen a mattress that truly cares for your comfort.

Great mattress! It’s very comfortable, supportive, and has really improved my sleep. Good quality for the price, and I’d definitely recommend it.. Anonymous. Fri Jul 17 2026

Kingsize (5')

Designed to provide supportive everyday comfort, this 12.5cm deep full-foam mattress features next-generation open-cell Reflex Foam with a medium-firm feel. With no springs inside, the mattress provides consistent support across the sleeping surface while offering a comfortable combination of cushioning and responsive bounce-back. The Reflex Foam structure is made up of thousands of tiny air cells that compress and respond as you lie on the mattress. This allows the foam to gently contour to the body while providing supportive resistance and returning to its original shape when not in use. Finished with a soft, breathable fabric across both the sleeping surface and border, the mattress encourages airflow to help manage excess heat and maintain a fresh and comfortable sleeping environment throughout the night. For convenient delivery and easier handling around the home, the mattress is compressed, vacuum-packed, rolled and boxed. Once unpacked, allow approximately 24–48 hours for the mattress to fully expand and return to its intended size and shape.

Firm mattress as described. Received next day with free delivery. Very happy. Asc. London. Wed Aug 05 2026

Kingsize (5')

A little extra depth for a first grown-up bed — ideal for teenage girls moving on from a bunk or cabin frame, while still fitting compact frames comfortably. Visco-elastic memory foam moulds to your shape, supporting the spine and neck while dispersing weight evenly to ease pressure at the shoulders, hips and lower back. A firmer layer beneath holds you level, which matters while you're still growing. Delivered rolled and boxed. Once unwrapped, allow 48–72 hours in a well-heated, well-ventilated room for the mattress to expand to full size and for the initial foam odour to clear. General information: Manufacturer's 1 year guarantee.

My son loves his new mattress. He said it’s so nice not having a spring sticking in his back!. Jo. Sun Mar 15 2026

Kingsize (5')

Our slimmest mattress, made for the lowest bed frames — a great choice for a child's first proper mattress in bunk beds, cabin beds and mid-sleepers. Visco-elastic memory foam moulds to your child's shape, supporting the spine and neck while dispersing weight evenly to ease pressure at the shoulders, hips and lower back. Its open-cell structure lets air circulate freely, and the foam is dust mite and mildew resistant. Delivered rolled and boxed. Once unwrapped, allow 48–72 hours in a well-heated, well-ventilated room for the mattress to expand to full size and for the initial foam odour to clear. General information: Manufacturer's 1 year guarantee.

Bought it as a bed topper. Very happy with the purchased. Delivered on time. Yaku. Cork, Ireland. Tue Jan 21 2025

King

An Ortho foam quality mattress provides firm orthopaedic support when used on either a divan base or a bed frame, helping to maintain the correct alignment of the spine and neck for a healthier and comfortable night sleep. Please note that fabric patterns may vary slightly from what’s pictured, but the quality remains the same.

Helped my back problems. Anonymous. Sat Jul 04 2026

Kingsize (5')

Our budget recon foam mattress is great value for anyone who is looking for a firm mattress and does not like the feel or warmth associated with memory foam, or the bounce that comes from springs. Recon foam is a non-reacting foam and therefore provides great orthopaedic support to the body. This silent mattress is suitable for all bed types. Single-sided mattress - please do not turn. Vacuum packed and rolled for easy delivery and transportation. Please note: once unrolled the mattress requires up to 72 hours to fully expand and reform to its original shape. The additives used in the manufacturing of foam may give rise to a slight odour. If this should occur, please remove all packaging and store it in a well-ventilated room for 48 hours. The odour is safe and will dissipate over time.

Brilliant mattress. Firm and perfect as a first big kid bed. Anonymous. Sun Aug 25 2024

Kingsize (5')

Our budget Recon foam mattress is great value for anyone who is looking for a firm mattress and does not like the feel or warmth associated with memory foam, or the bounce that comes from springs. Recon foam is a non reacting foam and therefore provides great orthopaedic support to the body. All materials are hypoallergenic and sanitised - perfect for allergy sufferers. Also includes anti dust mite properties. This silent mattress is suitable for all bed types. Single sided mattress - please do not turn. Vacuum packed and rolled for easy delivery and transportation. Please note: once unrolled the mattress requires up to 72 hours to fully expand and reform to its original shape. This mattress is available in multiple sizes including: 3FT single, 4FT Small Double, 4FT6 Double, 5FT King, E.

comfy , bit thin but cause its all foam its not bad - its great quality and my daughter got a great sleep last night with her new mattress. Anonymous. Tue Oct 01 2024

Kingsize (5')

This mattress is taken from our unique uni contract range – this mattress is designed specifically for commercial business and exclusively for hostels, hotels, halls of residences, students & universities which exceeds all required standards whilst providing both long-term value and superb levels of comfort. The mattress is designed with a Stamford stripe top panel with a 4-inch border (approximately 10cm). This full-foam orthopedic reflex foam mattress provides soft comfort. The reflex foam is made up of thousands of air bubbles that expand and contract when the sleeper lays on the mattress, providing the body molding and bounce-back properties which offers the user a firm yet hugely comfortable sleep experience whilst always returning to its natural shape when not in use. The contract mattress is fully compliant with all UK & EU legislation and regulations including fire tests & regulations source 5 fire retardant (medium hazard). We’ve also created this mattress to be dual-sided with our signature Stamford stripe fabric on both sides allowing the sleeper to either rotate or flip the mattress. This mattress will arrive vacuum-packed, rolled, and boxed. Once the mattress has been unpackaged, we recommend leaving the mattress for 24 to 48 hours to allow it to expand to its original size.

Good mattress. Light, supportive, comfortable, doesn't have a chemical smell like some mattresses do.. Anonymous. St. Leonards-on-sea, GB. Wed Aug 07 2024

Kingsize (5')

Enjoy a comfortable sleep starting with this mattress. Meticulously designed, it combines beauty and durability. The finely stitched top pattern and high-quality fire-resistant fabric surface ensure a soft touch while providing enhanced safety. Inside, multiple layers of foam, cotton and individually wrapped pocket springs offer excellent support, alleviating back pain and delivering a relaxing sleeping experience. Additionally, the symmetrical structure and reinforced edge support ensure overall stability, prevent edge collapse, and extend the service life. Let us welcome each new day full of vitality together.

King (5')

Sleep. Grow. Thrive. The Thrive Kids Trundle Eco Comfort Foam Mattress is designed to give children and teens a supportive, comfortable night’s sleep at an affordable price. Built with high-density Eco foam, this medium-firm mattress provides orthopaedic support that helps growing bodies maintain healthy posture and proper spinal alignment. Perfect for trundle beds, bunk beds, cabin beds, and guest beds, the low-profile design fits safely and securely into most raised frames. The silent, spring-free foam construction ensures no noisy springs or motion transfer, making it ideal for shared bedrooms, sleepovers, or light sleepers. This mattress is UK made with over 20 years of mattress-making experience, using CertiPUR certified foam and BS7177 fire safety compliant. The quilted, zip-off machine-washable cover keeps the mattress fresh, while the hypoallergenic, dust-mite resistant foam supports a healthier sleep environment for children. Lightweight, durable, and easy to clean, the Thrive Kids mattress is a smart, value-for-money choice for parents looking for comfort, support, and practical features without overspending.

It’s good value for the money , comfortable and cosy. Anonymous. Fri Jun 19 2026

King (5')

Thrive Kids Eco Comfort Foam mattress is designed with children’s comfort and safety in mind. Its 14cm high, medium-firm foam core provides a stable, supportive sleeping surface that promotes healthy posture and spinal alignment, perfect for kids, toddlers, and teenagers. The low-profile design makes it especially suitable for trundle beds and bunk beds, fitting securely while offering consistent support. Made in the UK using high-density EcoFoam sourced from recycled materials, the mattress is durable, safe, and environmentally conscious. It meets BS7177 fire safety standards and is CertiPUR-US certified for low chemical emissions, giving parents confidence in both comfort and quality. The removable, machine-washable quilted zip cover makes cleaning easy - ideal for busy households, sleepovers, or guest rooms. The sanitised, hypoallergenic foam naturally resists dust mites and allergens, helping to maintain a cleaner, healthier sleep environment for allergy-sensitive children. With a spring-free design, the mattress is silent and absorbs motion, ensuring uninterrupted sleep for light sleepers or siblings sharing a room. Practical, durable, and eco-friendly, it’s the perfect mattress for trundles, bunk beds, and guest use.

King (5')

Thrive Kids Trundle Support Foam mattress combines comfort, support, and practicality in a compact 10cm profile, making it ideal for trundle beds, bunk beds, or guest bedrooms. Crafted in the UK from high-density reflex foam (foam grade 30/105), it ensures your child’s weight is distributed evenly, promoting a comfortable and supportive night’s sleep. Designed with busy families in mind, hypoallergenic foam helps reduce exposure to allergens, making it suitable for allergy-sensitive children. Compact and convenient, the mattress arrives vacuum packed and rolled for easy transportation and handling. It fully expands within 72 hours of unpacking, providing a ready-to-use sleeping surface. As with all Viscotherapy mattresses, it is manufactured in the UK and conforms to all British Fire Regulations, ensuring both safety and peace of mind.

Kingsize (5')

This Iyer nature gel memory foam mattress is designed with a double-layer all-foam system, improving support and heat dissipation, mattress layers include a 2cm certified gel memory foam layer and 10cm of high-density base support foam for ultimate comfort. It includes a soft hypoallergenic cover layer that is washable for your convenience. All-foam bed design combines expertise and the best materials with advanced sleep technology. Memory foam is conducive to continuous airflow and breathability; skin-friendly fabrics adapt to the environment to keep the mattress surface at the ideal sleeping temperature; Buoyant, no-sink support foams adapt and conform to your body for optimal pressure relief. Specialized foams reduce the motion transfer of a partner so your sleep is undisturbed. This mattress is compressed and packaged in a box for shipping, allowing it to easily be delivered to your door and expand to its full lofty shape inside your home. They fit all frames, such as box springs, floor, slatted base, flat platform or adjustable bed, and hospital bed. Please allow up to 72 hours for the mattress to fully expand and for any potential odors to dissipate.

Great quality affordable memory foam mattress that provides both great comfort, support and heat distribution. Medium firm is perfect for my needs; I'm a stomach sleeper. It came in a box, very easy to unpack and transfer onto the bed frame. It includes a soft hypoallergenic cover layer that can be removed and washed. I highly recommend it!. Kazimierz. Culduthel Inverness, GB. Tue Jul 28 2026

Kingsize (5')

Enjoy a comfortable and supportive night’s sleep with this Gel Memory Foam Bonnel Spring Mattress, designed for everyday comfort and practicality. Conveniently delivered flat packed, the mattress is easy to set up—simply remove it from the box, roll it onto your bed, and allow up to 48 hours for it to fully expand before use. The durable Bonnel spring system provides a stable and supportive foundation, helping to evenly distribute weight and promote a good sleeping posture, while the gel-infused memory foam layer gently adapts to your body for enhanced comfort, pressure relief, and a cooler night’s sleep. Combining reliable support with modern convenience, this mattress is an ideal choice for a restful and refreshing sleep experience.

Lovely comfortable mattress. Margaret. Selston Nottingham, GB. Wed Jul 29 2026

5ft

Our Memory Foam Mattress is OEKO-TEX Certified to ensure a healthy sleep and give you peace of mind knowing you are receiving the best quality you deserve for a good nights sleep. Our mattress is made up of 7 layers, each adding a specific function to support the natural curves of your body, providing targeted support and pressure dispersion to relieve your body of any stress points allowing you to enter a more deep sleep through the night. The Memory foam layer is made up of open cell breathable foam making it skin friendly and allows good air flow. It comes vacuum packed in a box and only takes 72 hours to become the supportive, comfortable mattress that you need

Kingsize (5')

This premium mattress delivers lasting comfort and support for all sleepers. Its durable, easy-clean fabric cover pairs with multi-layer fillings and reinforced seams for strength and longevity. Individually wrapped pocket springs reduce motion transfer, keeping you undisturbed for a quieter, deeper sleep. Engineered for resilience, it resists sagging and wear even with long-term use. Safe, supportive, and built to suit all ages, it is an ideal choice for restful, refreshing sleep every night.

Kingsize (5')

This premium mattress delivers lasting comfort and support for all sleepers. Its durable, easy-clean fabric cover pairs with multi-layer fillings and reinforced seams for strength and longevity. Individually wrapped pocket springs reduce motion transfer, keeping you undisturbed for a quieter, deeper sleep. Engineered for resilience, it resists sagging and wear even with long-term use. Safe, supportive, and built to suit all ages, it is an ideal choice for restful, refreshing sleep every night.