Thick Mattress Topper Reviews UK (2023)

Most mattress toppers come with 4 corner straps.

To attach your mattress topper, wrap the elasticated straps around each mattress corner.

Ensure you secure your mattress topper before placing it on your mattress protector, sheets, and duvet.

Most mattress topper straps are stretchy enough to fit deep mattresses.

Ensure your mattress topper is the same size as your mattress. 

Our size guide:

• Single mattress topper thick: 90 x 190 cm (3’ x 6’3”)
• Small double mattress topper thick: 120 x 190 cm (4' x 6'3")
• Mattress topper double thick: 135 x 190 cm (4’6” x 6’3”)
• King size mattress topper thick: 150 x 200 cm (5’ x 6’6”)
• Super king mattress topper thick: 180 x 200 cm (6’ x 6’6”)

Measure the width and length of your mattress to find out what size you need.

Deep mattress toppers come in a variety of materials that have different benefits. 

Thick mattress topper materials include:

• Thick mattress topper memory foam
• Goose feather and down mattress toppers
• Gel memory foam mattress toppers
• Hollowfibre mattress toppers

You should consider your individual needs when choosing the materials.

For example, memory foam mattress toppers are hypoallergenic, making them a great anti-allergy choice.

Memory foam is dense and adapts to the body better than most other materials.

However, they also tend to be much warmer than regular mattress toppers. 

Natural mattress toppers with a cotton cover are more breathable.

Yet, they can be expensive, particularly if they have a high thread count. 

Alternatively, hollowfibre is much more budget-friendly but made with lower-quality materials. 

You should determine the essential requirements for your thick mattress topper and what kind of budget you have in mind. 

Extra thick bed toppers are available online and in many brick-and-mortar stores that sell bedding products.

This includes:

• Thick mattress topper Argos
• Thick mattress topper Wilko
• Thick mattress topper Dunelm
• Thick mattress topper Dreams
• Thick mattress topper Bensons for Beds
• Thick mattress topper John Lewis
• Thick mattress topper Amazon

There are also lots of popular UK brands that stock thick mattress toppers.

Look at our article on the best mattress toppers for more info. 

Side sleepers will often highly benefit from an extra thick mattress topper. 

When sleeping on your side, the weight of your body puts a lot of pressure on your hip and shoulder. ⬇️

The thicker the mattress topper, the more material there is to contour around these pressure point areas and prevent aches in your joints. 

But the thickness you need depends on your weight and body shape. 

Those with larger shoulders and hips may require a thicker mattress topper than those with smaller shoulders and hips.

Likewise, lighter people may require a softer topper to sink in the topper more deeply. 

But a side sleeper with a soft to medium-firm mattress may not require a mattress topper if they're already getting the right level of support. 

If you're unsure, we recommend opting for a thick topper with a sleep trial period. ⌛

Memory foam mattress toppers provide a softer more body-hugging feel than other mattress toppers. 

However, the ideal thickness for a memory foam topper varies based on your comfort needs.

For a subtle increase in softness, a topper with a depth of 4 to 5 cm (1.57" to 1.9") should suffice.

On the other hand, side sleepers who need extra cushioning to alleviate discomfort might opt for a thicker topper, 7 cm (2.7") or more, which allows for a deeper sink and additional joint-embracing support.

We've yet to see a memory foam mattress topper 10 cm (3.9") or more in thickness.

The Emma Premium topper is an excellent extra thick mattress topper UK at 9 cm (3.5") deep.

Some may be concerned that a thick mattress topper is terrible for the back, as a firm mattress is often recommended.

However, this depends on your sleeping position, weight, and pressure sensitivity.

Side and back sleepers usually feel more comfortable on a thick mattress topper as it should mould around the body without creating a dip in the spine.

Yet, stomach sleepers need a firm mattress without additional sinking to help keep the spine and neck aligned.

Lighter-weight sleepers will experience more comfort with the addition of a thick mattress topper. 

But heavier-weight sleepers may sink too deeply into a thick topper, creating a hammock effect on the spine.

Luckily, many thick mattress toppers include sleep trials so that you can test them out first. 

If you're waking up with back pain, it may be a sign that your mattress or pillow is not correctly supporting your spine.

Opt for a thick mattress topper with sufficient padding to mould your body's shape while ensuring your spine and neck remain aligned.

The ideal thickness of your mattress topper should consider factors like your body weight, preferred sleeping position, and support from your existing mattress.

Our article offers guidance on topper thickness based on specific needs. 

While mattress toppers are known for their depth-enhancing comfort, a mattress protector thick in design can offer some additional comfort.

These are often called quilted mattress protectors. 

Nevertheless, the main goal of a mattress protector is to safeguard the mattress.

Selecting a mattress protector with a waterproof layer is advisable instead of prioritising thickness for superior protection.