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      Firm Mattresses

      Specially designed to evenly distribute your weight as you sleep, firm mattresses are perfectly suited to help alleviate any back, neck, shoulder, and hip pain you might be experiencing. Although the softness of a medium mattress can certainly be comforting, sometimes our bodies need that little bit of extra support throughout the night for an uninterrupted rest. And if this sounds familiar, then a firm mattress might be just what you're looking for. Take a look at our filterable range below or head to the bottom for more details about firm mattresses.

      70 results

      Read what our verified customers are saying

      • Trustpilot 5 stars

        Excellent communication and mattress

        Excellent communication and mattress delivery bang on time. Great price on the emma mattress we chose, which is really comfortable

        Karen H
        8th May 2026 Verified
      • Trustpilot 5 stars

        Fantastic efficiency

        I couldn't quite believe that I could order a mattress on bank holiday weekend and still get next day delivery on a bank holiday, but it really happened. The mattress was the right mattress, it was all in good order, brand new as expected and wrapped in good quality plastic sheeting to protect it and keep it clean which really matters when you're buying a new mattress. The delivery staff will polite, very efficient, they will clearly busy but they didn't mind carrying my mattress up to the first floor, to my front door, which I was thrilled about because of my hernia. All in all I would thoroughly recommend this company and i'm just with almost without words at the efficiency. Not only that, but the slot that I got was early enough for me to still go for a swim with my son on the bank holiday which was fantastic.

        Elisa
        7th May 2026 Verified
      • Trustpilot 5 stars

        Kept me informed about the delivery

        Kept me informed about the delivery time which was very helpful. Removed old mattress and put the new mattress on the bed. Very pleasant delivery people.

        Mary
        7th May 2026 Verified
      • Trustpilot 5 stars

        Couldn't believe they delivered next

        Couldn't believe they delivered next day on a bank holiday. Delivery guys were fantastic. Offered to take off their shoes, and made sure I was totally happy with goods received. Even took a photo as the box was damaged. On top of it all, the mattress is brilliant! couldn't ask for more.

        Alexis
        7th May 2026 Verified
      • Trustpilot 5 stars

        No issues

        No issues, 2hr delivery window, seems like a good product, though it's too early to tell if the mattress will sink in the middle.

        Customer
        7th May 2026 Verified
      • Trustpilot 5 stars

        Fast delivery and Great Service

        Fast delivery, great service and swift delivery where I was kept well informed of arrival time. Couldnt fault them!

        Emma Rowson
        7th May 2026 Verified
      • Trustpilot 5 stars

        Easy purchase

        Easy purchase. Great communications and prompt (very prompt) deliverybeautiful sealy mattress as described

        Sarah
        7th May 2026 Verified
      • Trustpilot 5 stars

        The matress was delivered as promised

        The matress was delivered as promised, on time with with good notice by friendly and helpful couriers. The matress is as described although the 99 transport fee deterred me from returning/exchanging it, even though it is not 100% comfortable for my liking, a peril of online buying. Not a complaint

        Lewis Hanson
        7th May 2026 Verified
      • Trustpilot 5 stars

        Great service

        Great service, next day delivery as arranged and a very comfortable emma mattress. Would highly recommend and will be using this company again in the future.

        Emma P
        7th May 2026 Verified
      • Trustpilot 5 stars

        Excellent selection of mattresses and

        Great selection of mattresses and next-day delivery? honestly, it made the decision so easymattyessnextday is a no-brainer! we ordered our new mattress on a friday night, and by sunday morning it was already at our door talk about speedy! no delays, no hassle, just smooth, brilliant service from start to finish. Well definitely be back (though hopefully not too soon, were planning to enjoy this comfy new bed for a good few years first ). Thanks so much!

        Max S.
        7th May 2026 Verified

      Help & Buying Guides

      What are the different types of firm mattresses?

      Firm mattresses come in a range of different types to suit all sleepers:

      • Memory foam

      • Pocket sprung

      • Miracoil™

      • Traditional sprung 

      • Natural fillings

      • Geltex

      Whether you’re a front, side or back sleeper, prefer a more responsive feel or need to stop your partner’s night-time wriggling from disturbing your sleep, you can choose from a huge selection of firmer options here at MattressNextDay.

      Memory foam

      Designed for NASA’s space program, memory foam is incredibly supportive and comfortable. It moulds to the shape of your body, minimising pressure points and cradling your body for all-night comfort. Firm memory foam mattresses are usually single-sided, so they’re easy to look after, too.

      Pocket sprung

      A matrix of high-tensile steel springs sits in individual fabric pockets to create one of the best firm mattresses available. Each spring can act independently as well as respond to its neighbours, so movement transference is minimised. Incredibly comfortable and long-lasting.

      Miracoil™

      Exclusive to Silentnight, this unique system is designed to provide outstanding support with no roll-together or movement transference. Particularly suitable for front sleepers, these mattresses are top-quality options with plenty of extra comfort features.

      Traditional sprung 

      Using a matrix of interconnected springs, traditional sprung firm mattresses are a great budget option that provides good levels of comfort and support. They’re ideal if you want to replace a guest bed mattress and can be combined with mattress toppers for extra comfort.

      Natural fillings

      Using fillings such as pure wool, bamboo, and cotton, these mattresses are often naturally hypoallergenic. These are often chosen by shoppers looking for breathable materials and a fresher-feeling sleep environment.

      Cooling gel and Geltex

      One issue with memory foam mattresses is that they can often feel a little on the warm side. Cooling mattresses such as Geltex mattresses include a gel layer that keeps the sleeping area cooler and fresher, making them perfect for sleepers who suffer from night sweats or hot flushes.

      Is a firm mattress good for your back?

      Thinking about investing in a new mattress for back pain? Firm mattresses are often chosen by people looking for extra support, though comfort needs vary from person to person. If your mattress is too soft and unsupportive, you can sink into it too deeply which can cause your back to curve.

      If your surface is too hard, though, you can put too much pressure on different parts of your body, leading to aches, pains and stiffness. A decent firm mattress can help support a more neutral sleeping position, helping you to keep a healthy alignment and avoid back pain, stiffness and other bodily aches. They can also be a good option for those seeking a firmer, more supportive feel.

      Why should I buy a firm mattress?

      Firm mattresses are ideal if you like sleeping on your back or your stomach, this kind of mattress can support your weight without causing pain to pressure points, such as your heels, toes, buttocks, ribcage, elbows, shoulders, and head. It's also the ideal mattress type for a heavy person, as it prevents your hips and shoulders from dipping too far into the mattress surface, helping maintain a more neutral sleeping position.

      Comfort is a very subjective area and what might be the right resistance for one person may be completely wrong for another so it’s important to know what kind of tension suits you before you buy. Our guide to mattress firmness can help you better understand the different types available.

      Do firm mattresses last longer?

      Firm mattresses are just like any other mattress in that they last for approximately eight years before you need to start thinking about replacing your old mattress. We advise that single-sided mattresses (often those made from memory foam) are rotated from head to foot every six months or so to avoid dips, lumps, and bumps from forming - read our guide to turning and rotating your mattress for more help.

      For double-sided mattresses, flipping and turning every few months will achieve the same effect, prolonging the life of your mattress and preventing those uncomfortable lumps from forming. The firmness rating of a mattress will not have any direct influence on how long it lasts.

      What are the benefits of a firm mattress?

      When using a firm mattress, you may find it easier to settle into a comfortable sleeping position. If you have been bending during the day or sitting for long periods, after a hard day's work the stability that a firm mattress supplies may help improve comfort after a long day.

      Many hotels have firm mattresses throughout their rooms. Some hotels add an extra element of comfort and luxury by adding a firm memory foam mattress topper on top of the mattress. This also helps prolong the life of a mattress as well as providing an additional layer of comfort and support.

      Is next-day delivery available?

      With our 24-hour free delivery, your perfect firm mattresses can be at your doorstep as soon as possible. Browse our wide online selection today to explore options that are all handmade in the UK and offer the above benefits. Find out more by contacting our team who will answer any questions you may have.

      If you need help choosing the right mattress firmness for you, check out our Mattress Buying Guide for tips and tricks on how to choose the best type of mattress for you.

      Disclaimer: While our mattresses are designed to support healthy sleep posture, comfort is subjective. If you have a chronic medical condition or any health concerns, please consult a healthcare professional.