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.

14 products

20% OFF

Duke Ortho Mattress
From Original price was: £198.Current price is: £158.40.
Order Now and Get by May 15, 2025
20% OFF

Classic Cashmere 1000 Mattress
From Original price was: £445.Current price is: £356.
Order Now and Get by May 26, 2025
20% OFF

Gel Essence Ortho Mattress
From Original price was: £615.Current price is: £492.
Order Now and Get by May 15, 2025
50% OFF

Ruby Mattress
From Original price was: £1230.Current price is: £615.
Order Now and Get by May 26, 2025
50% OFF

Hinton Mattress
From Original price was: £1310.Current price is: £655.
Order Now and Get by May 26, 2025
20% OFF

Ironstone Mattress
From Original price was: £875.Current price is: £700.
Order Now and Get by May 26, 2025

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.

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.

Shopping Basket

Duke Ortho Mattress

Classic Cashmere 1000 Mattress

Gel Essence Ortho Mattress

Ruby Mattress

Hinton Mattress

Ironstone Mattress

Rosaline Mattress

Gel Plush Ortho Mattress

Ortho Therapy Mattress

Bamboo Nurture 4000 Mattress

Flora Care Mattress

Kelmscott 4524 Mattress

Wightwick 6024 Mattress

Deluxe Natural Mattress

What is a firm mattress?

Is a firm mattress better for back pain?

What is the best firm mattress?

Are firm mattresses good for side sleepers?

Buy firm mattresses and more with Sussex Beds