Super King Mattresses

Why choose a super king-size mattress?

A super king-size mattress offers extra space for a more comfortable sleeping experience, particularly if your partner moves around or snores during the night. According to our 2026 Sleep Survey, 35% of UK bed-sharers say their partner takes up too much space. A further 23% are annoyed by the heat their partner gives off. A super king is larger than a king, giving you an additional 12 inches of width. More room between you helps with both space and heat.

Which type of super king mattress is best for me?

Ideal super king mattresses for pressure relief

Memory foam mattresses are crafted from viscoelastic materials that, due to their open-cell structure, directly respond to pressure points and react to heat. When in contact with your body, they contour to your sleeping position, providing optimal support throughout the night. Similarly, latex mattresses adapt to your body’s movements, offering superior comfort, durability, and long-lasting support.

Top choice for minimising partner disturbance

Choose a pocket sprung mattress to prevent that 'roll together' feeling and reduce sleep disturbances. Pocket springs work by responding independently to movement, providing excellent support and reducing sleep disruption between partners.

Best super king mattress for temperature control

Featuring a cooling gel layer, ActiGel® mattresses help regulate body temperature, keeping you comfortable throughout the night.

Great for custom comfort

With a zip and link mattress, you can combine two smaller mattresses to make a super king, perfect if you and your partner have different comfort grade preferences. You can also consider separate bedding with two single duvets!

Most eco-friendly super king mattress

Natural material mattresses, made from sustainable options like wool and cotton, provide breathable comfort while being environmentally conscious. These super king mattresses are also great for those with allergies, as the materials are naturally hypoallergenic.

Most affordable super king mattress

One of our most cost-effective options, traditional spring mattresses are great for those who want comfort at a great value.

Choosing the right super king-size mattress for your sleeping position

Finding the most suitable super king-size mattress will also depend on your sleeping position:

If you sleep on your side, consider a soft or medium comfort grade super king mattress. These softer options provide essential support, alleviating pressure on joints during sleep. A medium comfort grade is typically better for those who frequently shift positions throughout the night.

If you change sleeping positions often, a super king memory foam mattress is ideal. It will mould to your body shape quickly, ensuring you remain comfortable regardless of your position.

Alternatively, if you prefer sleeping on your front or need the best mattress for sleeping on your back, a firm or very firm mattress is more suitable. These sturdier super king-size mattresses distribute your body weight more evenly, helping to relieve pressure and provide additional support for your spine and joints. A firm or very firm pocket spring mattress may also offer extra spinal support for a restful night’s sleep. For more information, check out the best mattress types for your sleeping position.

Choosing a super king-size mattress is an important investment—one that will last for years. That’s why we want to ensure you find the very best option. Our 100-Night Sleep Guarantee allows you to swap your mattress for another after 30-100 nights of use (T&Cs apply).

How will I get a super king mattress to my bedroom?

Every mattress comes with free delivery to your door. If you’d like it delivered to the room of your choice, you can select this option for an additional cost, so you don’t need to worry about getting it up the stairs or around corners. If you have tight spaces and aren’t sure it will fit, talk to our team to discuss our delivery options. If you have an old mattress you'd like to get rid of, then choose our recycling option to make things even simpler. Add this service to your basket and we'll send you all the packaging you need, so when our drivers turn up, they can take it away without any fuss. Nothing goes to landfill, so you can be sure that you're doing your bit to reduce waste.