Medium Mattresses

How to choose a mattress?

It all depends on the level of support you need, how much space you have and your budget. Simply decide on your desired type and firmness, the size that fits your bed and how much you'd like to spend.

Different comfort materials give their own unique feel. If you want to ease pain points, choose a pressure-relieving memory foam mattress. For a luxurious, fresh feel, try natural fillings. Those with allergies should choose a hypoallergenic anti-allergy option. Want something tried and tested? Check out our award-winning range.

Choose from our wide range of comfortable mattresses online and get your best night's sleep ever. If you need more advice, contact our fully-trained team and we'll be happy to help. With fantastic deals, you can find the best value mattress without compromising on comfort.

What are the types of mattresses?

There are many different types of mattresses, with different fillings and firmness ratings. From pocket sprung to memory foam mattresses, you can choose the best mattress type for you depending on your preferences and comfort needs. Many of our mattresses are award-winning, too!

Pocket sprung mattresses

Pocket sprung mattresses provide excellent back support. Each spring is wrapped in an individual pocket and reacts independently to support each area of your body. This also helps prevent 'roll-together' and reduces motion-transfer between you and your partner.

Orthopaedic mattresses

Orthopaedic mattresses (or ortho mattresses) are firmer than average and provide enhanced support. This helps care for your back, ensure healthy spinal alignment and can help reduce back pain.

Memory foam mattresses

Memory foam mattresses feel plush and snuggly. They're ideal if you love to sink into your mattress! Since they contour to your unique shape, they ease aches and pains and relieve pressure points.

Pillow top mattresses

Pillow top mattresses feel luxurious and extra-cosy. They're a great choice if you prefer to sleep 'in' your mattress, rather than 'on' it.

Gel mattresses

Gel mattresses are cooling, so you won't overheat as you sleep. They offer all the comfort of a foam mattress, but without the warmer feel.

Natural mattresses

Natural mattresses include fillings such as lambswool, cotton, cashmere and bamboo. Natural materials are more eco-friendly and sustainable. They're breathable and cooling, and many are hypoallergenic too.

Hybrid mattresses

Also known as 'combination mattresses', a hybrid mattress is made from pocket springs, with a top layer of foam. They provide great all-round comfort and support, and are ideal for all sleeping positions.

Rolled mattresses

Rolled, or bed-in-a-box mattresses, come rolled up for extra-fast next-day delivery. They're helpful when you're moving house and easier to install.

Hypoallergenic mattresses

If you suffer from allergies, choose a hypoallergenic option. These mattresses are less likely to cause allergy flare-ups, so you'll enjoy a more peaceful sleep.

Eco mattresses

Eco-friendly mattresses typically include recycled materials, such as Eco Comfort Fibre™. We also have a range of vegan mattresses. Choosing an environmentally-friendly mattress is a great way to care for our planet - in your sleep!

Which mattress size should I buy?

Mattress sizes are the same as standard bed sizes, so buy one which fits your bed. If you're upgrading both, you should choose the largest that your bedroom and budget will allow. That's because more space in bed will give you a better night's rest. We offer all common sizes, including single, double, king-size and superking mattresses.

A single mattress is perfect for a child's bedroom. If you sleep alone, a double mattress is spacious enough. Couples should invest in a king size or even a superking to get plenty of space to spread out.

Which mattress brands are on offer?

You can choose from a wide range of great mattress brands at Mattress Online. You'll get Free Next Day Delivery as standard, and enjoy big discounts.

Silentnight mattresses

Many Silentnight mattresses are award-winning and offer solutions for every sleeper. Choose an Eco mattress for planet-saving comfort, or if you sleep hot, take a look at the Geltex range.

Sealy mattresses

Sealy mattresses are designed in conjunction with leading orthopaedic experts to create their best-selling ortho collection - a must if you need extra care and support for your back.

Simba mattresses

A Simba mattress is designed to provide the perfect night's sleep - for everyone. They're tried and tested by 10 million sleepers, and feature cutting-edge mattress technology for your total comfort.

Sleepeezee mattresses

Sleepeezee mattresses are the product of over 100 years of expertise. You can choose from natural mattresses, backcare mattresses and zip and link options.

Millbrook mattresses

A Millbrook mattress is a wonderfully luxurious way to unwind after a long day. Featuring natural fillings and supportive pocket springs, each Millbrook is traditionally handcrafted for your comfort.

There are many other fantastic brands to choose from, too! Our SleepSoul mattresses offer great-value comfort, whilst our Casper mattress range all come with free sleep trials.

Take a look at our Relyon and Dunlopillo collections for premium comfort. Shop today and your brand-new mattress can be with you as soon as tomorrow!

How often should I change my mattress?

You should change it every seven years, according to advice from The National Bed Federation. Read more about replacing your mattress in our expert guide.

How can I clean my mattress?

We recommend cleaning it regularly to reduce dust and allergens.

First, remove your bedding and wash separately. Then vacuum your mattress and bed. Next, deodorise with baking soda for a fresher scent and spot clean any stains. Finally, flip over your mattress and repeat. See our cleaning guide for more information.

How can I dispose of my old mattress?

We're committed to protecting the environment, which is why we offer a recycling service to dispose of your old mattress for you.

If you opt for this, we'll simply take your old mattress away when we deliver your new one. That way, it will be 100% recycled and none of it will go to landfill. Read more about our mattress recycling scheme.

What's the best mattress?

The best mattress will give you the right support and comfort that you need. Each type has its own qualities, feel and firmness level, so it's important to find the perfect one for your sleep requirements. Popular choices include memory foam, pocket sprung, orthopaedic and hybrid mattresses.

Can I finance my new mattress?

We offer payment options from Klarna, including 0% Finance and Pay Later in 3. Both are interest-free payment methods that allow you to spread the cost of your new mattress. Learn more about paying with Klarna.

Which mattress firmness should I choose?

The right firmness level for you depends on your body shape, weight, sleeping position and personal preference.

For example, if you sleep on your side, try a medium feel mattress. If you have a larger frame, you might need the support of a firmer option. From medium-soft to extra-firm, you can choose from a variety of different feels and find your perfect fit for a great night's sleep.

Can I get a mattress with free delivery?

We include Free Next Day Delivery on all our mattresses in stock! Shop our next-day delivery range and get it as soon as tomorrow.