Black Friday Sale
Up to 50% Off
Ends in… 00dd 00hh 00mm 00ss
NOW ON

Medium Firm King Size Mattresses

Showing 1 to 12 of 95 Products
FILTER

Filter By

Filter By

Good-Housekeeping-24
Simba Hybrid Pro King Size Mattress
Guaranteed Xmas Delivery

SIMBA Hybrid Pro King Size Mattress

5/5
(5 Reviews)
£999Save £800RRP £1,799Was £1,479
From £333.0 per month
From £33.38 per month
  • Memory Foam Filling
  • 4800 Pocket Spring
  • 10 Year Guarantee
Medium Firm
Removal and Recycle Available
FREE Delivery in 5 Days
Awards-Best-Seller
Good-Housekeeping-Getting-Greener
Silentnight Amelia King Size Mattress
Guaranteed Xmas Delivery

SILENTNIGHT Amelia King Size Mattress

4.8/5
(72 Reviews)
£599Save £210RRP £809Was £669
From £199.67 per month
From £15.05 per month
  • Eco Fibre Filling
  • 1216 Mirapocket Springs
  • 5 Year Guarantee
Medium Firm
Removal and Recycle Available
FREE Delivery in 14 Days
Good-Housekeeping-24
Simba Hybrid Original King Size Mattress
Guaranteed Xmas Delivery

SIMBA Hybrid Original King Size Mattress

4.7/5
(7 Reviews)
£749Save £500RRP £1,249Was £1,099
From £249.67 per month
From £25.09 per month
  • Memory Foam Filling
  • 1900 Pocket Spring
  • 10 Year Guarantee
Medium Firm
Removal and Recycle Available
FREE Delivery in 5 Days
Mattress-Trial-60-Nights-sized
Dormeo Octasmart Premium Classic King Size Mattress
Guaranteed Xmas Delivery

DORMEO Octasmart Premium Classic King Size Mattress

4.9/5
(25 Reviews)
£467Save £312RRP £779Was £559
From £155.67 per month
From £13.04 per month
  • Foam Filling
  • Octaspring
  • 18 Year Warranty
Medium Firm
FREE Delivery in 10 to 14 Days
Silentnight Clarita Geltex Ultra 3000 King Size Mattress
Guaranteed Xmas Delivery

SILENTNIGHT Clarita Geltex Ultra 3000 King Size Mattress

5/5
(8 Reviews)
£1,199Save £440RRP £1,639Was £1,339
From £399.67 per month
From £30.12 per month
  • Gel Filling
  • 3045 Mirapocket Springs
  • 5 Year Guarantee
Soft Medium
Medium Firm
Removal and Recycle Available
FREE Delivery in 14 Days
Most-Comfortable-sized
Sleepeezee Ortho Elite King Size Mattress
Guaranteed Xmas Delivery

SLEEPEEZEE Ortho Elite King Size Mattress

4.9/5
(39 Reviews)
£539Save £140RRP £679Was £649
From £179.67 per month
From £15.05 per month
  • Memory Foam Filling
  • 1200 Pocket Spring
  • 10 Year Guarantee
Medium Firm
Removal and Recycle Available
FREE Delivery within 3 Weeks
Awards-Best-Seller
Healthbeds Elworth Latex 1400 King Size Mattress
Guaranteed Xmas Delivery

HEALTHBEDS Elworth Latex 1400 King Size Mattress

4.8/5
(5 Reviews)
£729Save £310RRP £1,039Was £799
From £243.00 per month
From £18.31 per month
  • Latex Filling
  • 1400 Pocket Spring
  • 5 Year Warranty
Medium Firm
Removal and Recycle Available
FREE Delivery in 3 to 4 Weeks
Mattress-Trial-60-Nights-sized
Viva Eco Hybrid King Size Mattress
Guaranteed Xmas Delivery

VIVA Eco Hybrid King Size Mattress

4.5/5
(2 Reviews)
£879Save £260RRP £1,139Was £979
From £293.00 per month
From £22.08 per month
  • Memory Foam Filling
  • 1697 Pocket Spring
  • 10 Year Guarantee
Medium Firm
Removal and Recycle Available
FREE Delivery within 3 Weeks
Hypnos Cambridge Deluxe King Size Mattress

HYPNOS Cambridge Deluxe King Size Mattress

4.8/5
(6 Reviews)
£959Save £280RRP £1,239Was £1,069
From £319.67 per month
From £24.09 per month
  • Natural Filling
  • ReActive 7 Pocket Spring
  • 10 Year Guarantee
Medium Firm
Removal and Recycle Available
FREE Delivery in 8 to 9 Weeks
Mattress-Trial-100-Nights-sized
Sealy Memory Deluxe Ortho King Size Mattress

SEALY Memory Deluxe Ortho King Size Mattress

5/5
(1 Reviews)
£773Save £306RRP £1,079Was £959
From £257.67 per month
From £21.58 per month
  • Memory Foam Filling
  • PostureTech™ Core Support Spring
  • 5 Year Guarantee
Medium Firm
Removal and Recycle Available
FREE Delivery within 7 Weeks
Mattress-Trial-100-Nights-sized
Sealy Richfield King Size Mattress

SEALY Richfield King Size Mattress

5/5
(1 Reviews)
£971Save £488RRP £1,459Was £1,199
From £323.67 per month
From £27.10 per month
  • Memory Foam Filling
  • 1800 Pocket Spring
  • 5 Year Guarantee
Medium Firm
Removal and Recycle Available
FREE Delivery within 7 Weeks
Mattress-Trial-100-Nights-sized
Sealy Knightsbridge King Size Mattress

SEALY Knightsbridge King Size Mattress

5/5
(1 Reviews)
£1,142Save £597RRP £1,739Was £1,399
From £380.67 per month
From £31.88 per month
  • Memory Foam Filling
  • 2400 Pocket Spring
  • 5 Year Guarantee
Medium Firm
Removal and Recycle Available
FREE Delivery within 7 Weeks
Show more
Showing 1 to 12 of 95 Products

Get in the know with our buying guides

View all