What is the Best Mattress for Side Sleepers?

Are you a side sleeper who often wakes up with a sore shoulder, stiff hip, or numb arm? If so, your mattress might be to blame. Many side sleepers don’t realise how much pressure builds up around the shoulders and hips during the night, especially on a mattress that’s too firm or lacks proper cushioning. 

That’s why choosing the right mattress is so important. With the right balance of softness and support, a mattress can help ease pressure points and keep your spine comfortably aligned. In this blog, we’ll guide you through the best firmness levels, mattress types suited for side sleepers and what to look for when choosing the one that fits you best.

What Mattress Firmness Is Best For Side Sleepers?

Side sleepers generally need a mattress that’s soft enough to cushion pressure points while still offering enough support to keep the spine in a healthy position. A medium to medium-soft mattress is typically the best choice, as it allows the shoulders and hips to sink slightly into the surface without causing the lower back to curve unnaturally. A mattress that’s too firm can lead to pressure build-up and joint stiffness, while one that’s too soft may lack the structure needed to support your spine.

In the UK, mattresses often come with a firmness rating on a scale from 1 to 10 - 1 being extremely soft and 10 being very firm. Side sleepers usually benefit from a firmness level between 4 and 6. This strikes a balance between pressure relief and proper alignment, particularly important for those who sleep in one position for most of the night. Medium or medium-soft memory foam and hybrid mattresses tend to perform well in this range.

Other Features to Consider

• Pressure Relief Zones: Choose a mattress designed with zoned support that targets the shoulders and hips, which are the main pressure points for side sleepers.
• Motion Isolation: If you share your bed, a mattress with strong motion isolation helps minimise disruptions from a partner moving during the night.
• Edge Support: Look for mattresses with reinforced edges if you tend to sleep near the edge or use the sides of the bed for sitting, as this improves stability and durability.
• Breathability: Side sleepers tend to stay in one position longer, so overheating can become an issue. Consider mattresses with breathable materials like gel-infused foam or open coil designs that promote airflow - particularly important in UK homes without air conditioning.
• Trial Periods and Returns: Many UK retailers offer trial periods of 60 to 100 nights or more. Choosing a mattress with a solid return policy gives you time to test it properly and ensures you're not stuck with one that doesn’t suit your sleeping style.

Mattress Comparison Table

Types of Mattresses for Side Sleepers

With so many options available, choosing the right mattress type can feel overwhelming - especially when you sleep on your side and need specific support. Side sleepers benefit most from mattresses that cushion pressure points like the shoulders and hips while still keeping the spine aligned. In this section, we’ll explore four common types of mattresses and how each one performs for side sleepers.

1. Memory Foam

What it is: Memory foam is a viscoelastic material that softens with body heat and pressure, moulding to your shape. It's known for its contouring abilities and pressure relief.

How does it help side sleepers: For side sleepers, memory foam cushions the shoulders and hips, two major pressure points in this position. It helps distribute weight evenly and supports the natural curve of the spine, reducing the chances of waking up with aches or stiffness.

Who should consider this mattress: This type is ideal for side sleepers who frequently wake with joint or shoulder pain, or those who prefer a "hugging" sensation in bed. It's also well-suited to individuals who sleep with a partner and want to minimise movement transfer.

Pros:

• Pressure Relief: Memory foam excels at relieving pressure around the hips and shoulders, making it especially suitable for side sleeping.
• Spinal Alignment: The adaptive foam promotes a healthy posture by conforming to the spine's natural curve.
• Motion Isolation: It absorbs movement effectively, so you’re less likely to be disturbed by a restless partner.
• Quiet Sleep Surface: There are no springs or coils, which means zero creaking or bouncing during movement.

Cons:

• Heat Retention: Traditional memory foam can trap body heat, which might feel uncomfortable, especially during warmer UK summers.
• Less Bounce: The dense structure absorbs movement, which some may find restrictive when changing positions.
• Edge Support: Foam-only models often lack reinforced edges, making it harder to sit or sleep near the sides.

2. Hybrid

What it is:
Hybrid mattresses combine layers of foam (usually memory foam or latex) with an innerspring system. This design aims to offer the best of both comfort and support.

How does it help side sleepers:
The foam layers provide pressure relief while the coils underneath maintain support and responsiveness. This balance is ideal for side sleepers who want contouring comfort without feeling stuck in the mattress.

Who should consider this mattress:
A hybrid is a great choice for side sleepers who like some cushioning but still want the supportive feel of springs. It’s also suitable for combination sleepers and those looking for better breathability.

Pros:

• Balanced Feel: Combines the body-conforming properties of foam with the structure of springs for all-around comfort.
• Better Airflow: The coil system promotes ventilation, which helps regulate body temperature.
• Improved Edge Support: Many hybrid mattresses feature reinforced edges, which add stability when sitting or sleeping near the sides.
• Good Responsiveness: Easier to move around on compared to pure memory foam.

Cons:

• Heavier Construction: Due to their multiple layers, hybrids can be bulky and more difficult to move.
• Higher Price Point: They tend to be more expensive than single-material mattresses.
• Potential Motion Transfer: Some hybrids with thinner foam layers may not isolate movement as well as pure foam models.

3. Orthopaedic

What it is:
Orthopaedic mattresses are designed to offer extra firm support, targeting spinal alignment and posture correction. They are often recommended for people with chronic back or joint pain.

How does it help side sleepers:
While typically firmer than what side sleepers usually need, some orthopaedic models with slight cushioning on top can offer enough support without sacrificing pressure relief. They can be helpful for side sleepers who need more stability due to health conditions.

Who should consider this mattress:
This mattress suits side sleepers with diagnosed back conditions, older adults needing extra support, or anyone who finds soft mattresses uncomfortable or unsupportive.

Pros:

• Spinal Support: Offers firm, even support that helps prevent the spine from sinking into misalignment.
• Durability: Typically made from high-density materials designed to last.
• Pain Relief: Can reduce discomfort associated with arthritis, sciatica, and other chronic issues.
• Minimal Sagging: Holds shape well over time and resists dipping in high-pressure areas.

Cons:

• Less Contouring: May feel too rigid for average side sleepers who need cushioning around joints.
• Break-in Time: Can feel overly firm at first and may take time to adjust to.
• Not Pressure-Point Friendly: Without a soft comfort layer, these mattresses might aggravate the shoulders and hips during side sleeping.

4. Latex

What it is:
Latex mattresses are made from either natural or synthetic latex, offering a supportive and springy feel. They tend to be breathable and long-lasting.

How does it help side sleepers:
Latex gently cradles the body while offering more bounce than memory foam. It supports pressure points without excessive sinkage, making it ideal for those who prefer a firmer feel that still cushions joints.

Who should consider this mattress:
Side sleepers who value eco-friendly materials, want a bit more bounce, or tend to sleep hot will find latex a solid option. It’s also a good choice for those with allergies, as latex naturally resists dust mites and mould.

Pros:

• Responsive Feel: Offers a buoyant feel that supports movement without trapping the body.
• Natural Cooling: The open-cell structure allows air to circulate, making it ideal for warmer bedrooms.
• Eco-Friendly Option: Natural latex is biodegradable and free from synthetic chemicals.
• Hypoallergenic Properties: Resists common allergens, which can be beneficial in the UK’s damper climate.

Cons:

• Can Be Pricey: Natural latex mattresses are often more expensive than other types.
• Firmness Can Vary: Some models may feel firmer than expected, especially for lighter side sleepers.
• Heavier Weight: Latex mattresses are dense and can be hard to lift or rotate.

How to Choose the Right Mattress for Side Sleepers

Finding the right mattress isn’t about guesswork - it’s about following a series of well-informed steps. Whether you’re shopping online or in-store, this guide will walk you through the decision-making process to help you choose a mattress that supports your sleep posture and relieves pressure effectively.

Step 1: Identify Your Preferred Firmness Level

For side sleepers, a medium to medium-soft firmness usually provides the right balance of comfort and support. On the UK firmness scale of 1 to 10, aim for a range between 4 and 6. This allows your shoulders and hips to sink just enough to keep your spine aligned, while still offering full-body support.

Step 2: Focus on Pressure Relief Features

Look for materials that cushion pressure points - especially around the hips and shoulders. Memory foam, latex or mattresses with zoned support layers are well-suited to this. If you often wake with a sore shoulder or hip, this step is particularly important.

Step 3: Choose the Right Mattress Type

Each mattress type has its own advantages:

• Memory foam for deep contouring and motion isolation
• Hybrid for a balanced feel with bounce and breathability
• Latex for durability and natural ventilation
• Orthopaedic for firm support and posture correction (though not ideal for all side sleepers)

Select the type that aligns best with your sleep preferences, comfort needs, and body weight.

Step 4: Think About Temperature Regulation

If you tend to sleep warm or your bedroom retains heat, consider a mattress with cooling features. Open-cell foam, coil layers, and breathable covers help promote airflow - important in UK homes that may lack climate control systems.

Step 5: Check for Edge Support and Motion Isolation

If you share a bed or often sleep close to the edge, prioritise strong edge support and motion isolation. These features offer better use of space and reduce sleep disturbances caused by your partner’s movements.

Step 6: Review Trial Periods and Return Policies

Many UK retailers offer trial periods ranging from 60 to 100 nights. Make sure you check how easy the return process is, especially if you’re buying online. A trial lets you test the mattress under real sleeping conditions without committing right away.

Step 7: Verify Safety and Certification Labels

Look for mattresses that meet safety standards such as CertiPUR or OEKO-TEX®, which confirm the materials are low in harmful emissions and suitable for long-term use. These are particularly helpful for allergy-prone individuals or those with sensitivities.

Pros of Choosing the Right Mattress for Side Sleepers

• Improved Pressure Relief: A mattress designed for side sleeping can reduce tension on your shoulders and hips, making sleep more comfortable and restorative.
• Better Spinal Alignment: With the right firmness and support, your spine stays properly aligned throughout the night, lowering the risk of chronic pain.
• More Restful Sleep: When your body is supported correctly, you’re less likely to toss and turn - leading to deeper, uninterrupted sleep.
• Long-Term Health Benefits: Investing in a mattress suited to your sleeping position can help prevent issues like joint strain, nerve compression, and postural imbalance over time.

Cons to Be Aware Of

• Higher Upfront Cost: Mattresses tailored to side sleeping often come with specialised materials, which can cost more than standard models.
• Trial and Adjustment Period: Even the right mattress may take time to get used to, and you may need a few weeks to feel the full benefits.

Now that you’ve explored the different mattress types, firmness levels, and features that matter most for side sleepers, you’re in a much better position to make an informed choice. The right mattress isn’t just about comfort - it plays a vital role in how well you rest, how you feel when you wake up, and your long-term joint and spine health. Whether you’re looking for pressure relief, support, or temperature control, taking the time to choose a mattress that suits your sleeping style can make all the difference. Keep these insights in mind as you shop and you’ll be one step closer to a better night’s sleep.