Find Your Perfect Mattress: Complete Buying Guide

Choosing a new mattress is one of the most important purchases you can make for your home, your comfort and your overall wellbeing. We spend around a third of our lives sleeping, and the quality of your mattress can have a huge impact on how well you rest, how refreshed you feel in the morning and whether you wake up with aches, stiffness or discomfort.

However, finding the best mattress is not always simple. With so many mattress types, sizes, firmness levels and materials available, it can be difficult to know where to start. Should you choose a memory foam mattress, a pocket sprung mattress, a hybrid mattress or an open coil mattress? Do you need firm support, soft cushioning or something in between? And how do you know when your current mattress needs replacing?

This ultimate mattress buying guide explains everything you need to know before making your decision. Whether you are buying your first proper bed, upgrading an old mattress, shopping for a guest room or looking for better support for back pain, this guide will help you choose a mattress that suits your sleeping position, body type, comfort preferences and budget.

It is worth remembering that there is no single “perfect mattress” for everyone. The best mattress for you depends on how you sleep, what feels comfortable to your body and the level of support you need throughout the night.

Before you start comparing mattress types, it is worth asking whether your current mattress is still doing its job. Many people put off replacing their mattress for years, even when it is clearly affecting their sleep quality.

You may need a new mattress if you notice any of the following signs:

Your mattress has become uneven, lumpy or visibly saggy. Over time, mattress materials naturally break down, especially in the areas where your body weight rests most heavily.

You regularly wake up feeling tired, even after spending enough hours in bed. Poor quality sleep can be caused by a mattress that no longer supports your body properly.

You wake up with back pain, neck stiffness, sore shoulders or aching joints. While a mattress is not always the only cause of pain, the wrong level of support can make discomfort worse.

You sleep better in other beds, such as hotel beds, a spare bed or even on the sofa. This is often a clear sign that your own mattress is no longer comfortable.

You toss and turn throughout the night because you cannot find a comfortable sleeping position.

You can feel springs, dips or hard areas through the surface of the mattress.

Your mattress is more than seven to ten years old and no longer feels supportive.

The expected lifespan of a mattress depends on its construction, quality and how well it has been cared for. As a general guide:

Choosing the right mattress size is just as important as choosing the right mattress type. Your mattress should give you enough room to stretch, turn and sleep comfortably without feeling restricted.

Here are the most common UK mattress sizes:

Mattress firmness describes how soft or hard the mattress feels when you first lie on it. It is not exactly the same as support. A mattress can feel soft while still being supportive, or firm while failing to contour properly to your body.

Most mattresses are rated on a firmness scale from 1 to 10, where 1 is extremely soft and 10 is extremely firm. Most sleepers prefer something between medium and medium-firm.

A soft mattress usually allows more sinkage and can feel plush or cushioned. This may suit lighter sleepers or side sleepers who need pressure relief around the shoulders and hips.

A medium mattress offers a balance of comfort and support. It is often a good choice for combination sleepers who change position during the night.

A medium-firm mattress provides stronger support while still offering some cushioning. This is a popular choice for back sleepers, stomach sleepers and people who want better spinal alignment.

A firm mattress has minimal sinkage and a more solid feel. It may suit heavier sleepers or those who prefer a very supportive surface, but it can feel too hard for some side sleepers.

Firmness is highly personal. Two people can lie on the same mattress and experience it differently depending on their weight, body shape and sleeping style. If you share a bed, you may also need to consider your partner’s preferences.

If you suffer from back pain, joint pain, shoulder pain or neck stiffness, choosing the right mattress becomes even more important. A mattress that is too soft can allow your body to sink out of alignment, while a mattress that is too firm can create pressure points.

The ideal mattress for back pain should provide:

• Good spinal alignment
• Even weight distribution
• Pressure relief around sensitive areas
• Support for the lower back
• Comfort in your preferred sleeping position

Medium-firm mattresses are often a strong choice for people with back pain because they combine support with enough cushioning to reduce pressure. Memory foam and hybrid mattresses can also be helpful because they contour to the body while supporting the spine.

Your pillow matters too. Even the best mattress may not solve neck or shoulder discomfort if your pillow is too high, too low or unsuitable for your sleeping position. A supportive pillow helps keep your head, neck and spine aligned.

Your body weight affects how a mattress feels. A mattress that feels firm to a lighter person may feel much softer to someone heavier. This is because heavier sleepers sink further into the mattress, while lighter sleepers may stay closer to the surface.

Lighter sleepers, generally under 10 stone, often prefer softer mattresses because they may not sink deeply enough into a firmer mattress to experience proper contouring. A softer surface can provide better cushioning around the shoulders, hips and knees.

Average-weight sleepers usually have the widest choice. Medium or medium-firm mattresses often work well, depending on sleeping position.

Heavier sleepers, especially those over 15 stone, often need a firmer and more supportive mattress to prevent excessive sinkage. A high-density memory foam mattress, supportive pocket sprung mattress or well-made hybrid mattress can be a good option.

Durability is also important for heavier sleepers. Look for strong support cores, high-density foam layers, quality springs and reinforced edges.

Your sleeping position is one of the biggest factors in choosing the right mattress. Side sleepers, back sleepers and stomach sleepers all need different types of support.

Side sleeping is one of the most common sleeping positions. If you sleep on your side, your shoulders and hips press more deeply into the mattress. This means you need a mattress that relieves pressure while still keeping your spine aligned.

Side sleepers often benefit from a medium or medium-soft mattress. Memory foam, hybrid and pocket sprung mattresses with cushioned comfort layers can work well because they contour around the body and reduce pressure points.

A mattress that is too firm may cause discomfort in the shoulders, hips and knees. A mattress that is too soft may allow the waist and lower back to sink too deeply, leading to poor alignment.

For side sleepers with back or joint pain, a medium-firm memory foam or hybrid mattress can offer a good balance of cushioning and support.

Back sleepers need support along the full length of the spine. When you sleep on your back, your body weight is spread across your shoulders, upper back, hips and heels. The mattress should support the natural curve of your lower back without allowing your hips to sink too far.

Back sleepers usually do well with a medium to medium-firm mattress, around 5 to 8 on the firmness scale. Lighter back sleepers may prefer something slightly softer, while heavier back sleepers may need firmer support.

Hybrid mattresses with a supportive spring base and a gentle foam top layer are often a good choice for back sleepers. Pocket sprung mattresses can also work well, particularly when paired with a comfortable pillow top or foam comfort layer.

Stomach sleeping is less common and can place extra pressure on the neck, chest, lower back and elbows. If your mattress is too soft, your hips and stomach may sink too deeply, causing the lower back to arch uncomfortably.

Stomach sleepers usually need a firmer mattress to keep the body more level. A medium-firm to firm mattress, around 6 to 8 on the firmness scale, is often best.

Heavier stomach sleepers may need a firmer mattress with strong support, while lighter stomach sleepers may prefer something closer to medium-firm. Breathability is also important, as stomach sleepers lie face down and may feel warmer during the night.

Combination sleepers change position throughout the night. If this sounds like you, look for a mattress that offers a balance of comfort, support and responsiveness.

A medium or medium-firm hybrid mattress is often a good choice because it provides cushioning, support and enough bounce to make moving around easier. A mattress that is too soft may make it harder to change position, while a mattress that is too firm may feel uncomfortable when you roll onto your side.

There are several main types of mattress, each with different benefits. The best mattress type depends on your comfort preferences, sleeping style and budget.

The most popular mattress types include:

• Pocket sprung mattresses
• Open spring or open coil mattresses
• Memory foam mattresses
• Hybrid mattresses

Each one offers a different sleep experience.

A pocket sprung mattress is one of the most traditional and popular mattress types. It is made using individual springs, each housed in its own fabric pocket. Because the springs move independently, they can respond more precisely to your body weight and sleeping position.

Pocket sprung mattresses are a good choice for couples because they reduce motion transfer compared with open coil mattresses. This means you are less likely to feel your partner moving during the night.

They are also available in a wide range of firmness levels, making them suitable for side sleepers, back sleepers and stomach sleepers.

One of the biggest advantages of a pocket sprung mattress is breathability. The space between the springs allows air to circulate more freely, helping the mattress stay cooler. Many pocket sprung mattresses also include natural fillings such as wool, cotton or silk, which can help regulate temperature.

When choosing a pocket sprung mattress, spring count is worth considering. As a general guide, aim for a mattress with at least 1,000 pocket springs. A higher spring count can provide more responsive support, though overall quality also depends on the fillings, construction and comfort layers.

Pocket sprung mattresses can be heavier than other types, and some may need regular turning. Always check the manufacturer’s care instructions.

An open spring mattress, also known as an open coil mattress, is usually one of the most affordable mattress options. It is made from a connected spring system, rather than individually pocketed springs.

Open coil mattresses are often lightweight, making them easier to move, rotate or turn. They can be a practical choice for guest rooms, children’s beds or temporary use.

However, they tend to offer less targeted support than pocket sprung mattresses. Because the springs are connected, movement can travel across the mattress more easily. This may make them less suitable for couples or restless sleepers.

Open spring mattresses can also wear out faster than other mattress types and may sag over time, particularly with regular use. They are generally best for shoppers on a tighter budget or for beds that are not used every night.

A memory foam mattress is made from a mouldable foam material that responds to body heat and pressure. It contours to the shape of your body, creating a distinctive “hugging” sensation.

Memory foam mattresses are known for excellent pressure relief. They can be especially useful for side sleepers, back sleepers and people who experience joint discomfort, as the foam helps cushion the shoulders, hips and lower back.

Memory foam also performs well for motion isolation. If you share a bed with a partner who moves around during the night, a memory foam mattress can help reduce disturbance.

Another benefit is that memory foam mattresses are often hypoallergenic. The dense foam structure can make it harder for dust mites and allergens to build up compared with some traditional sprung mattresses.

However, traditional memory foam can retain heat. Many modern memory foam mattresses now include cooling features such as gel-infused foam, breathable covers or open-cell foam structures to improve temperature regulation.

Quality matters. Not all memory foam is the same. Higher-density foams are usually more durable and supportive, while lower-density foams may feel softer but wear out more quickly.

Memory foam may not suit everyone. Stomach sleepers and people who dislike the feeling of sinking into a mattress may prefer a hybrid or pocket sprung option.