Clear
Close

Trending searches

Speak to a bed expert:
01928 242829
Deeper sleeper sale banner Couple laying on bed
Ends in… 0ddays 00hhours 00mmins 00ssecs

Firm King Size Mattresses

Showing 13 to 24 of 104 Products
Filter

Filter By

Filter By

View Products (104)
GHI-2025-Sized
Emma Diamond Firm Deluxe King Size Mattress

Emma Diamond Firm Deluxe King Size Mattress

Emma
Review Stars
5/5
(1 Reviews)
£999
Save £600
RRP £1,599
Was £1,479
From
£42.56
per month
Firm
  • Memory Foam Filling
  • Foam
  • 10 Year Guarantee
  • Free Emma Comfort Cooling Pillow Pair - RRP £230
FREE Delivery in 14 Days
mattress-trial-40-nights
Tempur Pro SmartCool Firm King Size Mattress

Tempur Pro SmartCool Firm King Size Mattress

Tempur
Review Stars
5/5
(1 Reviews)
£1,899
Save £1,550
RRP £3,449
Was £2,789
From
£66.25
per month
Firm
  • Memory Foam Filling
  • 10 Year Guarantee
FREE Delivery in 3 to 4 Weeks
mattress-trial-40-nights
Tempur Pro Plus SmartCool Firm King Size Mattress

Tempur Pro Plus SmartCool Firm King Size Mattress

Tempur
£2,199
Save £1,850
RRP £4,049
Was £3,299
From
£78.42
per month
Firm
  • Memory Foam Filling
  • 10 Year Guarantee
FREE Delivery in 3 to 4 Weeks
mattress-trial-40-nights
Tempur Pro Luxe SmartCool Firm King Size Mattress

Tempur Pro Luxe SmartCool Firm King Size Mattress

Tempur
Review Stars
5/5
(1 Reviews)
£2,699
Save £2,250
RRP £4,949
Was £4,049
From
£95.07
per month
Firm
  • Memory Foam Filling
  • 10 Year Guarantee
FREE Delivery in 3 to 4 Weeks
Silentnight Viola Box Top King Size Mattress

Silentnight Viola Box Top King Size Mattress

Silentnight
£1,232
Save £497
RRP £1,729
Was £1,549
From
£43.84
per month
Soft Medium
Firm
  • Gel Foam Filling
  • 3000 Pocket Spring
  • 5 Year Guarantee
FREE Delivery in 2 to 3 Weeks
NBF-Bed-of-the-Year-23-24-sized
Sleepeezee Centurial 03 King Size Mattress

Sleepeezee Centurial 03 King Size Mattress

Sleepeezee
Review Stars
5/5
(5 Reviews)
£2,099
Save £650
RRP £2,749
Was £2,339
From
£67.21
per month
Medium
Firm
  • Natural Fibre Filling
  • 7000 Pocket Spring
  • 10 Year Guarantee
FREE Delivery in 2 to 3 Weeks
Awards-Special-Buy
NBF Awards_Bed Manufacturer_Winner_F_D
Harrison Spinks Loop Original King Size Mattress

Harrison Spinks Loop Original King Size Mattress

Harrison Spinks
Review Stars
5/5
(6 Reviews)
£899
Save £430
RRP £1,329
Was £999
From
£28.79
per month
Medium
Firm
  • 3250 Pocket Spring
  • 10 Year Warranty
FREE Delivery in 4 to 6 Weeks
NBF Awards_Bed Manufacturer_Winner_F_D
Harrison Spinks Crystal Deluxe King Size Mattress

Harrison Spinks Crystal Deluxe King Size Mattress

Harrison Spinks
Review Stars
4.5/5
(8 Reviews)
£1,499
Save £540
RRP £2,039
Was £1,669
From
£48.00
per month
Soft
Medium
Firm
  • Natural Fibre Filling
  • 9500 Pocket Spring
  • 10 Year Warranty
FREE Delivery in 4 to 6 Weeks
NBF Awards_Bed Manufacturer_Winner_F_D
Harrison Spinks Aphrodite Deluxe King Size Mattress

Harrison Spinks Aphrodite Deluxe King Size Mattress

Harrison Spinks
Review Stars
5/5
(10 Reviews)
£1,799
Save £760
RRP £2,559
Was £1,999
From
£57.61
per month
Soft
Medium
Firm
  • Natural Fibre Filling
  • 14000 Pocket Spring
  • 10 Year Warranty
FREE Delivery in 4 to 6 Weeks
Mattress-Trial-60-Nights-sized
Millbrook Inspire Legacy King Size Mattress

Millbrook Inspire Legacy King Size Mattress

Millbrook
£879
Save £220
RRP £1,099
Was £979
From
£28.15
per month
Medium
Firm
  • Natural Fibre Filling
  • 1030 Pocket Spring
  • 10 Year Warranty
FREE Delivery in 3 to 5 Days
Mattress-Trial-60-Nights-sized
Millbrook Inspire Signature King Size Mattress

Millbrook Inspire Signature King Size Mattress

Millbrook
£999
Save £250
RRP £1,249
Was £1,099
From
£31.99
per month
Medium
Firm
  • Natural Fibre Filling
  • 2750 Pocket Spring
  • 10 Year Warranty
FREE Delivery in 3 to 5 Days
Mattress-Trial-60-Nights-sized
Millbrook Inspire Prestige King Size Mattress

Millbrook Inspire Prestige King Size Mattress

Millbrook
£1,199
Save £300
RRP £1,499
Was £1,339
From
£38.39
per month
Medium
Firm
  • Natural Fibre Filling
  • 4750 Pocket Spring
  • 10 Year Warranty
FREE Delivery in 3 to 5 Days
Show more
Showing 13 to 24 of 104 Products

Get in the know with our buying guides

View all
Happy woman sat on bed
How to Choose the Right Mattress
Find the right mattress for your needs with our ultimate guide
Person putting on mattress protector
Ultimate Guide to the Best Mattress Protector
Choosing the right mattress protector for your bed
Man sleeping in facemask
Choosing the Right Pillow for You
Ensure you have the right pillow to enhance your sleep
Boy sitting under a duvet
Ultimate Guide to Picking the Best Duvet
Don't feel overwhelmed, let us help you choose