Thin King Size Mattresses

10 cm, Kingsize (5')

This foldable gel-infused memory foam mattress delivers supportive medium-firm comfort with excellent pressure relief. The tri-fold design is easy to store, move and use for guests, camping or small spaces. A breathable removable cover keeps the surface hygienic, while the mattress ships conveniently compressed in a box.

Love this perfect for guest, it’s compact easy to put away and comfortable. Anonymous. Tue Aug 04 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

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

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')

This 7cm memory foam mattress topper enhances your bed with medium comfort and soothing pressure relief. The 7-zone ergonomic design adapts to different body areas, supporting shoulders, waist and hips for better alignment. Soft, resilient foam helps improve sleep quality, upgrade comfort and refresh your mattress instantly.

King - (150 x 200 cm)

Our Just Relax mattress hugs you to sleep all night long thanks to our body-moulding memory foam comfort layer. Enhanced further by our 3-zone Miratex support system which cushions your shoulders and hips, moulding to the contours of your body for total relaxation. Our Just Relax mattress sleep surface is finished with a soft-knit fabric which is hypoallergenic. The Just Relax mattress is also rolled for convenience and easy to get up staircases. Featuring our body hugging memory foam comfort layer which provides pressure relieving comfort as it cocoons your body for a truly relaxing sleep. We've made sleep easier than ever. Designed with ease and convenience in mind and with fast delivery, our Just Relax mattress comes rolled and wrapped so you can easily take it to your room of choice.

The mattress is definitely very comfortable and we are sleeping much better, my only issue with the mattress is the plastic smell, which is still very strong after nearly 2 months, even though I open the window every day,all day .. Lou. Cornwall. Fri Nov 08 2024

Kingsize (5')

This premium quality mattress, handcrafted in the UK, is a perfect choice for anyone looking for a dependable source of comfort in their bedroom. The mattress boasts a unique combination of two layers of Comfort Foam - the Top Comfort Layer and the Flipped Comfort Layer, which work together to provide an exceptional level of support to your body. It is an ideal choice for sleepers who prefer a perfect balance between comfort and support while sleeping. The thoughtfully designed mattress guarantees a restful and comfortable sleep, and it comes in various sizes to match your bed's specifications.

Kingsize (5')

Looking for a high-quality and reliable mattress to enhance your sleeping experience? Look no further! This mattress is proudly crafted in the UK and offers the perfect combination of comfort and support. It features both a Top Comfort Layer and a Flipped Comfort Layer of Comfort Foam, which are strategically placed to provide you with the ultimate sleeping experience. The Top Comfort Layer is designed to adjust to your body's shape, offering a personalized level of comfort, while the Flipped Comfort Layer provides the perfect amount of support to keep your spine aligned throughout the night. So, if you're looking for a medium level of support and a comfortable night's sleep, this mattress is an excellent choice. Available in a range of sizes to fit any bed, you can rest easy knowing you've made the right choice.

Springs come through mattress, Would not recommend, very hard. Emma Egan. Chorley, GB. Fri Sep 05 2025

Kingsize (5')

This mattress has been carefully designed to offer support and promote muscle recovery to help maintain an active lifestyle. This mattress features a combination of Top Comfort Layer and Flipped Comfort Layer of Memory Foam, which provide a medium level of support & Ideal for sleepers who want that mix between comfort and support. The mattress design ensures a comfortable night's sleep and it is available in a range of sizes to suit your bed.

Kingsize (5')

Experience superior comfort with the PureDream Memory Foam Mattress by DS Living, designed to support restful, undisturbed sleep. Featuring Intelli-Memory Foam that adapts to your body’s contours, it provides pressure relief and promotes spinal alignment, while the durable high-density OptiCore base ensures lasting support for all sleep positions. This 13cm thick mattress is ideal for lighter weight users and children up to the age of 15, as we typically recommend 15cm and under for younger sleepers. For adults, we suggest choosing a mattress that is 20cm or thicker for optimal support and comfort. The soft-knit, removable, and washable cover ensures a fresh, hygienic sleep environment, while breathable materials help regulate temperature. Delivered as a mattress in a box, it quickly expands to its full size upon unpacking, with a 10% expansion variance that’s normal for memory foam. Proudly crafted in the UK, the PureDream mattress meets BS 7177 fire safety standards and is CertiPUR-certified, ensuring it’s free from harmful chemicals. Safe for your family and built to last, it’s the best memory foam mattress for those seeking premium comfort and peace of mind.

Black, Kingsize (5')

Transform Your Bedroom into a Haven of Comfort & Style

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'), Cream, Firm

An all-foam mattress designed using high-quality materials for an uninterrupted night's sleep. The mattress features high-density reflex foam as its core material. Reflex foam is a no-sink material as a very supportive and durable foam. Unlike memory foam, reflex foam is fairly firm, is not temperature sensitive, and does not mold to your body, it provides a relatively quick bounce back. Due to these special properties, the foam provides great support, it will distribute your weight evenly to relieve pressure from key areas such as your neck, shoulders, hips, and back. Due to the springless design, the mattress allows for a silent, undisturbed night's sleep. 'No roll together is a great advantage to an all-foam reflex mattress. This means both users will not find themselves rolling towards the middle of the mattress, you will also not disturb a sleeping partner when moving around at night. The mattress comes complete with a quilted cover for extra comfort. The cover is also removable to allow for easy cleaning and maintenance. Sanitized materials are used to provide hypoallergenic and anti-dust mite properties. A great mattress for allergy and asthma sufferers. This mattress is vacuum-packed and rolled for easy delivery. Please allow up to 72 hours once opened for the mattress to expand and reform to its original shape. Please Note: The additives used in the manufacturing of foam may give rise to a slight odor. If this should occur, please remove all packaging and store it in a well-ventilated room for 48 hours. The odor is safe and will dissipate over time.

Nice mattresses!. Shimaa. London, GB. Wed Apr 15 2026

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')

Experience exceptional comfort and lasting support with the Sareer Reflex Plus Matrah. Designed with an extra-thick layer of premium Reflex foam, this mattress delivers a soft yet supportive sleep surface that adapts naturally to your body. The high-quality Reflex foam is manufactured without fillers, ensuring it won’t crumble or lose its shape over time, so you can enjoy consistent comfort and durability for years to come. Finished with a luxurious two-way stretch cover, the Reflex Plus Matrah offers a smooth, soft-touch feel and added convenience. Providing a medium-to-firm sleeping surface, it is ideal for sleepers who value excellent back support. Versatile and practical, this mattress is perfectly suited for bedsteads, bunk beds, and foldaway beds, making it a dependable choice for a wide range of spaces. Crafted by Sareer, the Reflex Plus Matrah combines comfort, resilience, and thoughtful design for a better night’s sleep.

Very comfortable. Anonymous. Tue Jul 21 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. 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')

The Dream Sleep Mattress is made from unique upper layer of high density visco-elastic polymer gel. It 's elastic ability allows it to conform to your body shape to relieve pressure points across the body. This improves blood circulation and improves your sleep.

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 in a well ventilated room for 48 hours. The odour is safe and will dissipate overtime.

Came air packed but opened up properly within 48 hours. Comfy mattress really good price. Samantha. Grangemouth, GB. Sun Sep 15 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.

Really good. Bought for a small kids bed.good quality. Anonymous. Sat Dec 07 2024

Kingsize (5')

The Sareer Latex Foam Matrah is designed to deliver exceptional comfort and reliable support for a truly restful night’s sleep. Featuring a responsive latex foam comfort layer, this mattress gently adapts to your body’s natural contours, helping to relieve pressure while maintaining balanced support throughout the night. Working in harmony with the supportive reflex foam base, the mattress distributes body weight evenly to promote proper spinal alignment and reduce movement during sleep. The breathable latex foam layer is ventilated to encourage airflow, helping regulate temperature and maintain a fresh, comfortable sleeping environment. Designed for both comfort and durability, the Sareer Latex Foam Matrah offers a resilient sleep surface that quickly responds to movement while retaining its shape over time. The mattress also features a removable soft knit zip cover, making it easy to remove and wash for convenient care and long-lasting freshness. Combining advanced mattress technology with premium materials, the Sareer Latex Foam Matrah provides a supportive, comfortable, and hygienic sleep surface — ideal for anyone seeking a cooler, more refreshing night’s sleep.

Wasn't too bad. Should have got thicker. Jubaer. Southsea, GB. Fri Aug 02 2024

Kingsize (5')

Reflex is a high-density foam, but uses larger bubbles than memory foam. When pressure is applied to these bubbles the air inside doesn't escape but is displaced sideways. Once pressure is relieved, the bubbles spring back and the mattress retains its shape.

Good quality and good price. Mohsin. Mon May 25 2026