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10 Best King Mattress Toppers

From leading brands and best sellers available on the web.

Our Top Picks

#1

Winner

Silentnight Deep Sleep 5cm King Mattress Topper - Luxury Soft 5cm Thick Deep Mattress Topper Enhancer Pad Protector with Easy Fit Straps - Hypoallergenic and Machine Washable - King Size - 200x150cm

Rating
10.0
Chosen by1,187
Thickness
Thickness
"Thicker than expected, delivering a nice and comfy experience."

The Silentnight Deep Sleep King Mattress Topper is designed to enhance your sleeping comfort with its 5cm thickness, providing a plush layer on top of your existing mattress. Made from hypoallergenic microfiber, it is perfect for those with sensitivities as it reduces the risk of allergic reactions. This topper is not just about comfort, as it features easy fit straps that ensure it stays securely in place, preventing any annoying shifting during the night.

Its quilted cover with internal walls helps maintain the plumpness and supportive nature of the filling, which helps to rejuvenate older mattresses by adding a fresh, cushioned layer. Its machine washable nature means maintaining its cleanliness and hygiene is straightforward, which is an added convenience.

The topper, while designed to offer cloud-like comfort, lacks specific temperature regulation features which may be a consideration for those who sleep hot. Additionally, at 5cm, it provides moderate cushioning but might not be sufficient for those seeking substantial support or relief from a very firm mattress. With a high customer rating and being a top seller, it seems to be a well-received choice for many looking to enhance their sleep experience without an entirely new mattress purchase.

Rating
10.0
Chosen by1,187
Thickness
Thickness
"Thicker than expected, delivering a nice and comfy experience."
#2

Silentnight Impress Memory Foam Mattress Topper - 7cm Extra Thick Luxury Orthopedic King Size Mattress Topper for Back and Neck Pain - Removable Washable Cover

Rating
9.7
Thickness
Temperature Regulation
Material
Thickness
Allow two full days for the topper to fully unfurl and reach its intended 7cm depth for maximum comfort.
Temperature Regulation
The topper delivers a noticeably comfortable sleep experience, even when layered with an additional cooling fibre topper.
Material
No unpleasant odors were detected, and the topper settles quickly within hours of unpacking.
Density
The softness may not suit everyone, especially those with arthritis or similar conditions, as it can feel too soft and cause discomfort.

The Silentnight Impress Memory Foam Mattress Topper is a 7cm thick, king-size topper designed to enhance comfort and support, especially for those who sleep on their back or side. Made from memory foam, it gently molds to your body, offering soothing pressure relief that helps ease back and neck pain. Its extra depth provides a cushioned feel that can breathe new life into an old mattress.

The topper comes with a removable, machine-washable cover, making it easy to keep fresh and hygienic. It’s also hypoallergenic, which is beneficial for those sensitive to common allergens. While memory foam is known for comfort, it may retain some heat, which could be a consideration for sleepers who tend to get hot.

Weighing 3.5kg, it is relatively easy to handle. This product suits anyone looking for extra softness and pressure relief on a king-size bed, providing an orthopedic-friendly option.

Rating
9.7
Thickness
Temperature Regulation
Material
Thickness
Allow two full days for the topper to fully unfurl and reach its intended 7cm depth for maximum comfort.
Temperature Regulation
The topper delivers a noticeably comfortable sleep experience, even when layered with an additional cooling fibre topper.
Material
No unpleasant odors were detected, and the topper settles quickly within hours of unpacking.
Density
The softness may not suit everyone, especially those with arthritis or similar conditions, as it can feel too soft and cause discomfort.
#3

Silentnight Deep Sleep Luxury Mattress Topper - Soft Supportive Comfortable Durable Bed Topper with Easy Fit Elasticated Straps - Quilted Wavy Stitch Cover - Hypoallergenic & Machine Washable, King

Rating
8.2
Thickness
Material
Allergy Considerations
Thickness
Its thickness is ideal for those seeking a soft cushioning layer rather than firm support, delivering the best sleeps consistently.
Material
Hypoallergenic materials and a soft-touch cover provide a cozy, allergy-friendly sleeping surface.
Allergy Considerations
Hypoallergenic materials and a soft-touch cover provide a cozy, allergy-friendly sleeping surface.

The Silentnight Deep Sleep Luxury Mattress Topper is designed to add a soft and supportive layer to your existing king-size mattress, making it a good choice for anyone looking to improve sleep comfort without buying a new mattress. It is 2.5 cm thick, which offers a gentle cushioning effect rather than firm support. The topper is water repellent and made with hypoallergenic materials, so it’s suitable for those who are sensitive or prone to allergies. Its quilted wavy stitch cover feels soft against the skin and helps with a comfortable night's sleep.

The generous filling suggests moderate support, ideal if you want extra softness and a cozy feel rather than a very firm surface. The topper also promises improved breathability and temperature regulation to keep you from overheating during the night. Practical features include easy-to-use elasticated straps that keep the topper securely in place on your mattress, and the whole topper is machine washable, making it easy to keep clean and fresh.

At 2.5 cm thick, it may not be thick enough if you want a very plush or orthopedic level of comfort. Also, if you prefer a firmer topper or one made from memory foam or latex, this product might feel too soft. This mattress topper suits those wanting a soft, allergy-friendly, and low-maintenance way to refresh their mattress for deeper, more comfortable sleep.

Rating
8.2
Thickness
Material
Allergy Considerations
Thickness
Its thickness is ideal for those seeking a soft cushioning layer rather than firm support, delivering the best sleeps consistently.
Material
Hypoallergenic materials and a soft-touch cover provide a cozy, allergy-friendly sleeping surface.
Allergy Considerations
Hypoallergenic materials and a soft-touch cover provide a cozy, allergy-friendly sleeping surface.

Buying Guide for the Best King Mattress Toppers

Choosing the right king mattress topper can significantly enhance your sleeping experience by adding comfort, support, and even extending the life of your mattress. When selecting a mattress topper, consider your personal comfort preferences, any specific sleep issues you may have, and the type of mattress you currently own. A good mattress topper can help alleviate pressure points, regulate temperature, and provide additional support where needed. It's important to understand the different materials and features available to make an informed decision that best suits your needs.
MaterialThe material of a mattress topper is crucial as it determines the feel, support, and durability. Common materials include memory foam, latex, down, and wool. Memory foam is known for its contouring properties and pressure relief, making it ideal for those with joint pain. Latex is more responsive and cooler, suitable for those who prefer a bouncier feel. Down and wool offer a plush, soft feel and are great for those who want a natural option. Consider your comfort preference and any allergies when choosing the material.
ThicknessThickness affects the level of comfort and support a mattress topper provides. Toppers typically range from 1 to 4 inches thick. A 1-2 inch topper can add a slight comfort layer without drastically changing the feel of your mattress, suitable for those who just need a little extra cushioning. A 3-4 inch topper offers more significant support and can help with pressure relief, ideal for those with older mattresses or who need more support. Choose a thickness based on how much change you want in your mattress feel.
DensityDensity is a measure of how much material is packed into a given volume and affects the firmness and durability of the topper. Higher density toppers (4-5 lbs per cubic foot) are firmer and more durable, providing better support and longevity, suitable for heavier individuals or those needing more support. Lower density toppers (2-3 lbs per cubic foot) are softer and less durable, offering a plush feel, ideal for lighter individuals or those who prefer a softer sleeping surface. Consider your weight and support needs when choosing density.
Temperature RegulationTemperature regulation is important for maintaining a comfortable sleep environment. Some materials, like memory foam, can retain heat, while others, like latex or gel-infused foam, are designed to be more breathable and cooler. If you tend to sleep hot, look for toppers with cooling features such as gel infusions, open-cell structures, or breathable covers. If you sleep cold, a topper with insulating properties like wool or down might be more suitable. Consider your typical sleep temperature when selecting a topper.
Allergy ConsiderationsFor those with allergies, the material of the mattress topper can be a significant factor. Hypoallergenic materials like latex, wool, or synthetic down alternatives can help reduce allergic reactions. Memory foam is also generally resistant to dust mites and allergens. If you have specific allergies, ensure the topper is made from materials that won't trigger them. Additionally, look for toppers with removable and washable covers to maintain cleanliness and reduce allergens.