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King size mattress toppers
Unfortunately, no deals have been found for King size mattress toppers today
NOW
£ 299.00
£ 399.00
Dormeo Rejuvenated Octasmart Plus Mattress - Double, King, Super King
NOW
£ 19.99
£ 59.99
Soft Bamboo Memory Foam Mattress Topper - 5 Sizes & Up to 5cm Thickness!
12 bought
NOW
£ 19.99
£ 59.99
Soft Bamboo Memory Foam Mattress Topper - 5 Sizes & Up to 5cm Thickness!
16 bought
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£ 14.99
£ 39.99
Self-Heating Thermal Mattress Topper - 5 Sizes
1 bought
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£ 79.00
£ 208.00
Emma Original Reversible Mattress Topper - Single Size
7 bought
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£ 24.99
£ 69.99
Grey 4-inch Microfibre Mattress Topper - 5 Sizes
4 bought
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£ 60.00
£ 129.00
Comfimat 2 Inch Gel Foam Mattress Topper - 3 Sizes
1 bought
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£ 34.00
£ 99.00
5cm Memory Foam Mattress Topper - 6 Sizes!
3 bought
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£ 49.00
£ 124.00
7.5cm Memory Foam Mattress Topper - 6 Sizes!
1 bought
NOW
£ 27.99
£ 69.99
Shredded Memory Foam Mattress Topper - Hotel Quality, 5 Sizes, Removable Cover
2 bought
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£ 39.99
£ 59.99
Hotel Quality Duck Feather & Down Mattress Topper - 7cm Thick, 4 Sizes
NOW
£ 49.99
£ 80.00
Hotel Quality Dual Layer Memory Foam Mattress Topper - Hypoallergenic, Breathable, 5 Sizes
7 bought
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£ 32.99
£ 84.99
10cm All Seasons Reversible Mattress Topper - Sherpa & Microfibre, 5 Sizes
3 bought
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£ 19.99
£ 59.99
Premium Memory Foam Mattress Topper - 5 Sizes & Up to 5cm Thickness!
41 bought
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£ 14.99
£ 39.99
Hotel Quality Foldable Mattress Topper - Knitted Cotton, Air Flow, 4 Colours, Standard Size
2 bought
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£ 599.00
£ 1520.00
Dior Bespoke Bed Frame and Mattress, Super King, Grey Plush Fabric
1203 bought
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£ 109.00
£ 219.99
Memory Foam Hybrid Sprung Mattress, 5ft king, Grey
5229 bought
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£ 49.00
£ 129.99
Zig Zag Memory Fibre Hybrid Mattress - Single, Double, King & More
274 bought
NOW
£ 129.00
£ 279.00
1500 Pocket Sprung Medium-firm Soufflé Mattress - Pressure Relief & Enhanced Support (Small Single to Super King)
13 bought
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£ 79.00
£ 190.00
Crushed Velvet Divan Bed with 4-Drawer Storage, Crushed Velvet & Memory Foam Mattress - Double, King or Single
204 bought
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£ 39.99
£ 89.99
Dreamcatcher Deluxe Inflatable Air Bed Mattress - Double or King, Enhanced Support
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£ 19.99
£ 39.99
'Bamboo Memory Foam Mattress Topper - 4 sizes available!
- Age group: Adult
- Brand: iStyle Mode
- Location: National Deal
1822 bought
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£ 135.00
£ 508.48
Coco Plush Velvet Upholstered Bed with Memory Spring Mattress - All-In-One Comfort & Style (Single to Super King)
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£ 179.00
£ 264.50
EARLY BIRD! MAX Hybrid Memory Foam Mattress - Pressure Relief & Support (Single, Double, King)
1 bought
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£ 103.00
£ 180.00
White Plush Divan Bed with Storage Drawers, Plush Upholstery & Memory Sprung Mattress - Single, Double, King
43 bought
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£ 179.00
£ 359.00
PRICE DROP! Emma Original Mattress - Refurbished, Brand New & Mattress Topper Options!
103 bought
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£ 14.99
£ 29.99
Hotel Quality Air Flow Mattress Topper - 5 Sizes!
12 bought
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£ 24.99
£ 63.12
10cm Microfibre Mattress Topper - 4 Sizes!
4 bought
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£ 174.99
£ 499.99
PRICE DROP! Ottoman Divan Bed with Gas Lift Storage, Premium Fabric & Optional Mattress - Single, Double or King
- Brand: Sleep Softly Ltd t/a UKFurniture4U
- Gender: Unisex
- Location: National Deal
36 bought
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£ 12.99
£ 22.99
Sherpa Reversible Teddy Fleece Mattress Topper - 3 Sizes
6 bought
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£ 24.99
£ 69.99
10cm Luxury EzySleep Bounce Mattress Topper - 5 Sizes
22 bought
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£ 32.00
£ 89.99
Soft Bamboo Mattress Topper - 4 Sizes & 2 Thickness Options
13 bought
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£ 29.99
£ 49.99
Winter Warmth Super Thick 10cm Mattress Topper - 3 sizes!
1 bought
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£ 19.99
£ 42.99
NightComfort Hotel Quality Deep Mattress Topper - Microfibre, Anti-Allergy, 4 Sizes
17 bought
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£ 52.00
£ 129.00
Comfimat 5cm Reflex or Memory Foam Mattress Topper with Cover - 3 Sizes
1 bought
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£ 24.99
£ 39.99
Hotel Quality 5cm Airflow Mattress Topper - Breathable Comfort, 5 Sizes
NOW
£ 19.99
£ 79.99
Premium Thick Mattress Topper - 4 Sizes!
10 bought
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£ 14.99
£ 29.99
Hotel Quality 5cm Microfibre 3D Bubble Mattress Topper - Machine Washable, 4 Sizes
8 bought
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£ 64.99
£ 164.00
10cm Memory Foam Mattress Topper with Soft Knit Cover - 6 Sizes, Hypoallergenic
7 bought
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£ 39.00
£ 86.99
2 Inch Deep Luxurious Memory Foam Mattress Topper in 5 Sizes
NOW
£ 29.99
£ 49.99
Gel Infused Memory Foam Mattress Topper - Hotel Quality, Temperature Control, 4 Sizes
4 bought
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£ 24.99
£ 39.99
Cooling 7-Zone Memory Foam Mattress Topper - Hypoallergenic, Breathable, Multiple UK Sizes & Depths
2 bought
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£ 19.99
£ 65.00
Orthopaedic Hypoallergenic Memory Foam Mattress Topper - Hotel Quality, 2.5cm Thick, 5 Sizes
5 bought
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£ 24.99
£ 49.99
5-Zone Memory Foam Mattress Topper - Hotel Quality, Airflow Design, Multiple Sizes, Optional Cover
2 bought
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£ 24.99
£ 49.99
Memory Foam Mattress Topper - 8 Options!
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£ 62.26
£ 109.99
DreamEasy 2-Inch Hotel Quality Memory Foam Mattress Topper - Machine Washable Cover, Easy Fit, Pressure Relief
NOW
£ 15.99
£ 35.99
Plush Memory Foam Mattress Topper with Breathable Quilted Fabric Comfort
28 bought
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£ 199.00
£ 699.99
EARLY BIRD! Modern Boucle Bed Frame & Base with Curved Headboard - Double or King
1 bought
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£ 199.00
£ 325.00
Elegant Danish Modern Bed Frame & Base - Double/King
NOW
£ 47.99
£ 129.99
Contemporary Metal Platform Bed with Slatted Frame - Single, Double, or King
4 bought
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£ 19.99
£ 39.99
Luxury Thick Pure Cotton Fitted Bed Sheet - Soft, Breathable & Machine Washable - Single, Double, King & Super King Sizes
NOW
£ 10.99
£ 19.99
Luxury Satin Fitted Sheet Bedding Set - Hypoallergenic, Deep Pocket, Machine Washable - Double, King & Super King Sizes
3 bought
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£ 350.00
£ 939.00
Iris Luxe Contemporary Upholstered King Size Bed Frame with Optional Ottoman Storage - Minimalist Wingless Design, Multiple Sizes
- Age group: Adult
- Brand: Cuddly Beds
- Location: National Deal
NOW
£ 219.00
£ 315.00
Milan Traditional Solid Wood Oak Bed Frame - Double & King Size
1 bought
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£ 120.00
£ 596.00
Maya Chesterfield Upholstered Bed Frame - King Size, Plush Fabric, Contemporary Style
- Age group: Adult
- Brand: Cuddly Beds
- Gender: Unisex
20 bought
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£ 200.00
£ 596.00
Maya Upholstered King Size Bed Frame with Gas Lift Storage - Chesterfield Style
- Age group: Adult
- Brand: Cuddly Beds
- Gender: Unisex
13 bought
Discover wow-worthy comfort with King size mattress toppers on Wowcher UK. From memory foam king size toppers to latex king toppers, these upgrades transform tired mattresses into cloud-soft support for every sleeper.
Whether you’re after cooling gel-infused, hypoallergenic, or plush pillow-top variants, Wowcher brings deals on a range of king bed toppers, including 2-inch, 3-inch, and thicker options with breathable cover fabrics like bamboo, cotton, and removable washable covers to suit your cleaning routine.
Unbeatable Deals on King Size Mattress Toppers
Browse Wowcher UK for offers that include memory foam king size toppers, latex king size toppers, and cooling gel-infused toppers designed to keep you cool through the night. Look for options with removable covers, bamboo fabric or cotton covers, and multiple thicknesses like 2-inch, 3-inch, and 4-inch to tailor support and comfort. Our partners frequently feature promotions such as free delivery, promo codes for bulk orders, and regional shipping perks to maximise value.
Whether you’re shopping a king-size memory foam topper for pain relief, a latex topper for bounce and support, or a wool blend topper for natural temperature regulation, you’ll see clear listing details at checkout to compare size, material, density, and care requirements quickly.
Frequently Asked Questions
What is a king size mattress topper and what thickness should I choose?
A king size mattress topper sits on your existing bed to add padding, support, and sometimes a cooling layer. Typical thickness options include 2-inch (5 cm), 3-inch (7.5 cm), and 4-inch (10 cm) toppers. If you sleep hot or need more pressure relief, a thicker topper or a memory foam with cooling features can help. For guests or lighter sleepers, a thinner topper may be enough to refresh a tired mattress.
Back sleepers may prefer a medium density in the 2–3 inch range for balanced support, while side sleepers often benefit from slightly thicker toppers to cushion shoulders and hips. Consider your body weight, mattress firmness, and any existing aches when choosing thickness.
What materials are available and which is best for allergy sufferers?
Common materials include memory foam for contouring support; latex for buoyant resilience; and natural options like wool or bamboo-derived covers for temperature regulation. For allergy-prone sleepers, look for toppers with hypoallergenic materials, anti-microbial covers, and removable, washable covers to reduce dust mites and allergens.
Gel-infused or open-cell memory foam can help with heat dissipation, while breathable covers (cotton or bamboo) enhance airflow. Always check for certifications like CertiPUR-US or Oeko-Tex to ensure materials meet safety standards.
How do I care for and clean a king size topper?
Care typically centers on the removable cover: machine wash on cool with mild detergent and tumble dry on low, or line dry if advised. The topper core usually shouldn’t be machine washed; spot clean with a gentle fabric cleaner and let it air dry. Regularly rotate the topper to maintain even wear and keep it looking and feeling fresh.
Use a mattress protector for spill resistance and to increase longevity. Always follow the manufacturer’s care instructions on the label, as materials vary between memory foam, latex, and wool toppers.
Can a topper help with back or shoulder pain?
Yes, a well-chosen king size topper can improve sleep comfort and reduce pressure on joints. A memory foam topper with medium density (roughly 3–4 lb/ft³) can provide contouring support for the shoulders and hips, while a latex topper offers buoyant support and stability. If you have a history of back pain, pair a topper with an evenly firm mattress and aim for a gradual transition in firmness rather than a dramatic change.
Experiment with thickness and material to find the balance between support and plushness that suits your body. Always consult a healthcare professional for persistent pain or sleep disorders.
Will a topper improve cooling and breathability?
Cooling benefits depend on material and cover. Gel-infused memory foam, open-cell foams, and latex toppers typically promote airflow and heat dissipation better than dense traditional memory foams. A breathable cotton or bamboo cover enhances airflow and wicks moisture, helping you sleep cooler through the night.
If you’re sensitive to heat, look for toppers labeled as cooling, breathable, or designed for hot sleepers. Pairing a topper with a bed frame that promotes ventilation also contributes to a cooler sleep surface.
What sizes are available beyond king, and how do I measure for fit?
Beyond king, options include super king (180x200 cm) and other regional sizes. Always measure your mattress to confirm the topper will fit snugly, length and width should match or exceed your bed’s dimensions. In the UK, a standard king size is typically 150x200 cm; a super king is 180x200 cm. If you’re near the edge, consider a topper with a little extra overhang and secure it with a fitted sheet or elastic straps.
When ordering on Wowcher, check the product dimensions and the bed’s actual size in your home to avoid a poor fit. Some toppers come with corner straps to keep them in place on deep mattresses.
Are toppers easy to install, and do they affect mattress warranties?
Topper installation is straightforward: place it on top of the mattress, smooth out wrinkles, and put on your fitted sheet. They don’t typically affect mattress warranties, but it’s best to check the policy of the mattress and topper brands you’re buying. If you use a thick topper, ensure your bed frame and foundation can support the added height and weight.
Always read listing details for compatibility notes, care guidelines, and warranty information. On Wowcher listings, you’ll often find clear return policies and delivery options to suit your schedule.