Memory Foam King Size Mattresses Under £150

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')

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

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')

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')

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')

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