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Upgrade your sleep for less this February - Trade in your old bed today & save up to £1,500💥 | Upgrade your sleep for less this February - Trade in your old bed today & save up to £1,500💥 | Upgrade your sleep for less this February - Trade in your old bed today & save up to £1,500💥
Home › Firm Mattresses

Firm Mattresses

Our firm mattresses are ideal for those who like a little more support than a soft or medium mattress can provide. We offer both pocket sprung and memory foam firm mattresses, so you’re sure to find the perfect firm mattress for you. Browse our full range of firm mattresses below.

  • Price: —

96 products

  • Nectus Pure Support Mattress - Super King

    Nectus Pure Support Mattress – Super King

    £1930
  • Nectus Pure Support Mattress - Small Double

    Nectus Pure Support Mattress – Small Double

    £1435
  • Nectus Pure Support Mattress - Single

    Nectus Pure Support Mattress – Single

    £1070
  • Nectus Pure Support Mattress - King

    Nectus Pure Support Mattress – King

    £1665
  • Nectus Pure Support Mattress - Double

    Nectus Pure Support Mattress – Double

    £1435
  • Ebony Natural Mattress - Small Double

    Ebony Natural Mattress – Small Double

    £1500
  • Ebony Natural Mattress - Single

    Ebony Natural Mattress – Single

    £1250
    Order Now and Get by February 11, 2026
  • Ebony Natural Mattress - King

    Ebony Natural Mattress – King

    £1750
    Order Now and Get by February 11, 2026
  • Ebony Natural Mattress - Double

    Ebony Natural Mattress – Double

    £1500
  • Motion Luxe 7000 Mattress - Super King

    Motion Luxe 7000 Mattress – Super King

    £6240
  • Motion Luxe 7000 Mattress - King

    Motion Luxe 7000 Mattress – King

    £6240
  • Motion Luxe 7000 Mattress - Euro Double

    Motion Luxe 7000 Mattress – Euro Double

    £4750
  • Motion Luxe 7000 Mattress - Euro Small Double

    Motion Luxe 7000 Mattress – Euro Small Double

    £4750
  • Motion Luxe 7000 Mattress - Euro Single

    Motion Luxe 7000 Mattress – Euro Single

    £3120
  • Motion Luxe 7000 Mattress - Euro Small Single

    Motion Luxe 7000 Mattress – Euro Small Single

    £3120
  • Motion Comfort Mattress - Super King

    Motion Comfort Mattress – Super King

    £2000
  • Motion Comfort Mattress - King

    Motion Comfort Mattress – King

    £2000
  • Motion Comfort Mattress - Euro Double

    Motion Comfort Mattress – Euro Double

    £1650
  • Motion Comfort Mattress - Euro Small Double

    Motion Comfort Mattress – Euro Small Double

    £1650
  • Motion Comfort Mattress - Euro Single

    Motion Comfort Mattress – Euro Single

    £1000
  • Motion Comfort Mattress - Euro Small Single

    Motion Comfort Mattress – Euro Small Single

    £1000
  • Nova Balance Mattress - Single

    Nova Balance Mattress – Single

    £783
  • Nova Balance Mattress - King

    Nova Balance Mattress – King

    £1191
  • Nova Balance Mattress - Super King Zip and Link

    Nova Balance Mattress – Super King Zip and Link

    £1767
  • Nova Balance Mattress - King Zip and Link

    Nova Balance Mattress – King Zip and Link

    £1359
  • Nova Balance Mattress - Super King

    Nova Balance Mattress – Super King

    £1599
  • Nova Balance Mattress - Double

    Nova Balance Mattress – Double

    £987

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What is a firm mattress?

A firm mattress is a type of mattress that provides a high level of support and typically has a minimal amount of cushioning. Firm mattresses are designed to keep the body in a relatively flat position, which can help keep the spine aligned and prevent it from sinking into the mattress. A firm mattress is rated a ‘4’ on our scale of firmness, with 1 being softest and 5 being the firmest.

Is a firm mattress better for back pain?

Firm mattresses are often recommended for people who have back pain, as they can provide a supportive surface that keeps the spine in a neutral position. 

What is the best firm mattress?

The best firm mattress for you will depend on your personal preferences, your sleeping position and whether or not you have back problems. For the ultimate comfort, we recommend hybrid firm mattresses which contain both memory foam and pocket springs, such as our Bamboo nurture mattress.

Are firm mattresses good for side sleepers?

Firm mattresses are generally not recommended for side sleepers. When sleeping on your side, your body’s weight is concentrated on the hips and shoulders, and a firm mattress may not provide enough give to properly cushion these areas, which can result in uncomfortable pressure points. We would recommend a medium or medium firm mattress for side sleepers.

Buy firm mattresses and more with Sussex Beds

Browse our full range of firm mattresses online, or take a look at our medium soft, medium, medium firm or extra firm options. UK delivery, assembly service and disposal of existing furniture services available.

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Sussex Beds

Sussex Beds™ is a true independent family business and this is immediately obvious with its warm welcome & relaxed shopping experience. Our team are fully trained to guide you in finding a quality bed that meets your specific needs.

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