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Upgrade your sleep for less this April - Trade in your old bed today & save up to an extra £250💥 | Upgrade your sleep for less this April - Trade in your old bed today & save up to an extra £250💥 | Upgrade your sleep for less this April - Trade in your old bed today & save up to an extra £250💥
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: —

17 products

  • Duke Ortho Mattress

    Duke Ortho Mattress

    From £213 Original price was: £213.£170Current price is: £170.40.
    Order Now and Get by April 11, 2026
  • Rosaline Mattress

    Rosaline Mattress

    From £755 Original price was: £755.£378Current price is: £377.50.
    Order Now and Get by April 22, 2026
  • Classic Cashmere 1000 Mattress

    Classic Cashmere 1000 Mattress

    From £500 Original price was: £500.£400Current price is: £400.01.
    Order Now and Get by April 11, 2026
  • Gel Essence Ortho Mattress

    Gel Essence Ortho Mattress

    From £729 Original price was: £729.£583Current price is: £583.20.
    Order Now and Get by April 11, 2026
  • Nova Balance Mattress

    Nova Balance Mattress

    From £783 Original price was: £783.£626Current price is: £626.40.
    Order Now and Get by April 22, 2026
  • Hinton Mattress

    Hinton Mattress

    From £1400 Original price was: £1400.£700Current price is: £700.01.
    Order Now and Get by April 22, 2026
  • Ironstone Mattress

    Ironstone Mattress

    From £920 Original price was: £920.£736Current price is: £736.01.
    Order Now and Get by April 22, 2026
  • Ebony Natural Mattress

    Ebony Natural Mattress

    From £1250 Original price was: £1250.£750Current price is: £750.
    Order Now and Get by April 11, 2026
  • Motion Comfort Mattress

    Motion Comfort Mattress

    From £1000 Original price was: £1000.£800Current price is: £799.99.
  • Nectus Pure Support Mattress

    Nectus Pure Support Mattress

    From £1070 Original price was: £1070.£856Current price is: £856.01.
    Order Now and Get by May 6, 2026
  • Gel Plush Ortho Mattress

    Gel Plush Ortho Mattress

    From £1104 Original price was: £1104.£883Current price is: £883.20.
    Order Now and Get by April 11, 2026
  • Bamboo Nurture 4000 Mattress

    Bamboo Nurture 4000 Mattress

    From £1221 Original price was: £1221.£916Current price is: £915.76.
    Order Now and Get by April 22, 2026
  • Aura Support Mattress

    Aura Support Mattress

    From £1255 Original price was: £1254.50.£1004Current price is: £1003.61.
    Approximate Delivery Time: 1 - 2 Weeks
  • Flora Care Mattress

    Flora Care Mattress

    From £1487 Original price was: £1487.£1190Current price is: £1189.61.
    Order Now and Get by May 6, 2026
  • Ruby Mattress

    Ruby Mattress

    From £1245
    Order Now and Get by April 22, 2026
  • Deluxe Natural Mattress

    Deluxe Natural Mattress

    From £2300 Original price was: £2300.£1610Current price is: £1610.
    Order Now and Get by April 22, 2026
  • Motion Luxe 7000 Mattress

    Motion Luxe 7000 Mattress

    From £3120 Original price was: £3120.£2496Current price is: £2496.

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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