King Size Mattresses (under 15cm Thick) Under £150

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

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

Designed for restorative sleep, this 11cm 3‑layer foam mattress combines cooling memory foam, soft comfort foam, and high‑density support foam to deliver pressure relief and balanced spinal alignment. The breathable, skin‑friendly cover and OEKO‑TEX® certified foams create a safe, comfortable sleep environment. Fully compliant with UK fire safety standards (BS 7177), this versatile mattress is suitable for bed frames, sofa beds, or floor use. Available in Single(90x190cm), Small Double(120x190cm), Double(135x190cm) and King(150x200cm) sizes to suit different bed types.

Very comfortable. Melvito. Tue Jun 30 2026

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

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.

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

The Westwood Ortho Firm Foam Mattress by The Foam People has been carefully designed to provide reliable firm support, practical comfort, and long-lasting durability for everyday use. Featuring a high-density reflex foam core, this orthopaedic mattress helps to evenly distribute body weight while promoting healthy spinal alignment, making it an excellent choice for those who prefer a firmer sleeping surface.At 10cm deep, the Westwood mattress combines supportive comfort with a compact, low-profile design that is ideal for a wide range of bed types and spaces. Whether used on bunk beds, cabin beds, guest beds, trundle beds or day bedsthis versatile foam mattress offers dependable comfort without unnecessary bulk.The breathable hypoallergenic cover helps create a fresher and more comfortable sleeping environment, while the lightweight construction makes the mattress easy to move, rotate, and position when needed. Designed and manufactured in the UK, the Westwood Ortho Firm Foam Mattress is crafted using quality materials to deliver excellent value, practicality, and performance.Perfect for children, teenagers, guest rooms, occasional use sleeping spaces, and leisure vehicles, this mattress is an ideal solution for customers seeking firm orthopaedic-style support in a slim and versatile design. Delivered rolled and boxed for convenience, the mattress quickly expands and is ready to provide supportive comfort night after night.

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.

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