Split Tension Mattresses: Different Firmness on Each Side

Finding the right mattress as a couple can be difficult when you prefer different levels of firmness. One person may sleep best on a medium mattress, while the other prefers something much firmer.

A split tension mattress solves this problem by allowing each side of the same mattress to have a different firmness level. Sometimes called a dual tension mattress or split firmness mattress, it gives both sleepers their preferred comfort without needing two separate mattresses.

At Coast Road Furniture in Connah's Quay, we offer selected premium mattresses from brands including Harrison Spinks and Hamilton & James with split tension options available.

What Is a Split Tension Mattress?

A split tension mattress looks much like a standard mattress from the outside, but the internal construction allows the two sides to offer different levels of firmness.

For example, one sleeper could choose a medium feel while their partner chooses firm or extra firm. Depending on the mattress range, combinations may include:

• Medium and medium firm
• Medium and firm
• Medium firm and firm
• Firm and extra firm

The mattress remains one complete sleeping surface, so there is no obvious gap between the two sides and no need for separate bedding.

Why Do Couples Choose Different Mattress Firmness Levels?

There is no single mattress firmness that suits everyone. Your preferred level of support can depend on factors such as body weight, sleeping position, body shape and simple personal preference.

One partner may prefer a softer feel that cushions the shoulders and hips, while the other may feel more comfortable on a firmer sleeping surface. Neither preference is wrong, but trying to compromise on one mattress can mean neither sleeper gets their ideal comfort.

A split tension mattress allows both people to choose independently.

Is There a Join Down the Middle?

No. A split tension mattress is normally manufactured as one complete mattress rather than two separate mattresses placed side by side.

The difference in firmness is created within the internal spring and comfort structure. During normal use, most sleepers will not notice where one tension changes to the other.

This is one of the main advantages of split tension compared with simply placing two individual mattresses together.

What Sizes Are Split Tension Mattresses Available In?

Split tension is generally most useful on larger mattresses designed for two people. Availability varies between manufacturers and individual mattress models, but it is commonly offered on selected king size and super king size mattresses.

Some manufacturers may also offer additional size options, so it is always worth checking the specification of the particular mattress you are considering.

Our team can explain which models and sizes are currently available with different firmness levels on each side.

Split Tension vs Zip and Link Mattresses

Split tension and zip-and-link mattresses can both provide different comfort levels for two sleepers, but they work differently.

A split tension mattress is one complete mattress with different firmness levels built into each side.

A zip-and-link mattress consists of two separate mattresses joined together, normally with a zip. These can often be separated and used individually if required.

For couples who simply want different firmness levels while keeping the appearance and feel of one mattress, split tension is often the neater option. Zip-and-link mattresses can be more suitable where flexibility or separate beds may sometimes be required.

What Are the Benefits of a Split Tension Mattress?

• Different firmness on each side: each sleeper can choose the comfort level they prefer.
• One complete mattress: there is no obvious centre gap between two separate mattresses.
• Better compromise for couples: neither person has to settle for a mattress that feels too soft or too firm.
• Premium construction: split tension is commonly available on higher-quality pocket sprung mattresses.
• Reduced disturbance: individually responsive pocket springs can also help reduce movement travelling across the mattress.

Are Split Tension Mattresses Pocket Sprung?

Many split tension mattresses use individual pocket springs because the spring system can be tailored to create different support levels across each half of the mattress.

Selected premium models may also include natural fillings such as wool, cotton, hemp or other breathable fibres, providing cushioning and helping regulate temperature throughout the night.

However, the exact construction varies by manufacturer, so the most important thing is to try the mattress and choose the combination that feels right for both sleepers.

Who Should Consider a Split Tension Mattress?

A split tension or dual tension mattress could be particularly useful if:

• You and your partner prefer noticeably different mattress firmness levels.
• One person regularly finds a shared mattress too soft or too firm.
• You want different support on each side without using two separate mattresses.
• You are investing in a premium mattress and want to personalise the comfort for both sleepers.

If you have previously searched for a mattress with different firmness on each side, split tension is likely to be the type of mattress you are looking for.

Split Tension Mattresses at Coast Road Furniture

At Coast Road Furniture, we offer selected premium mattresses with split tension options, including models from Harrison Spinks and Hamilton & James.

Because firmness is highly personal, we recommend trying the different options in person rather than choosing purely from a description online. Our team can help both partners compare firmness levels and find a combination that feels comfortable and supportive.

Our Connah's Quay showroom serves customers across Deeside, Flintshire and the surrounding North Wales and Cheshire area, with free local delivery available on our mattress ranges.

Frequently Asked Questions

Can you get a mattress with two different firmness levels?

Yes. A split tension mattress allows one side of the mattress to have a different firmness level from the other, making it ideal for couples with different comfort preferences.

Is a split tension mattress the same as a dual tension mattress?

Yes. The terms split tension, dual tension and split firmness mattress are often used to describe the same idea: a mattress offering different firmness levels on each side.

Can one side be medium and the other firm?

Yes, on selected models. The available combinations depend on the manufacturer and mattress range, but medium, medium firm, firm and extra firm options may be available.

Do you feel the split in the middle?

Normally, no. The change in firmness is built into the internal construction of one complete mattress, so there is no obvious gap down the centre.

Is split tension available on every mattress?

No. It is normally offered only on selected mattress ranges and sizes, particularly premium pocket sprung models.

Find the Right Firmness for Both of You

Choosing a mattress as a couple does not have to mean compromising on comfort. A split tension mattress can provide different support on each side while still looking and feeling like one complete mattress.

Visit Coast Road Furniture in Connah's Quay to try our mattress ranges and speak to our team about the split tension options currently available.

[Blog updated 25th Aug 2026]