Best Mattress for Side Sleepers - Expert Picks – Sonno
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Mattress Guide

What Is The Best Mattress for Side Sleepers?

8 min read
September 25, 2025
By Sonno Beds
What Is The Best Mattress for Side Sleepers?

Summary:

Side sleeping is common, but it definitely differs you from back and stomach sleepers. That also means you require some unique features in your mattress that support your bodyโ€™s most important zone, which requires pressure relief in the side position. So, to ensure you know everything about it, read this guide below that has practically all the information you need for choosing your mattress.


To be able to sleep on your side is only half the battle when it comes to finding the ideal mattress; getting up without aches in your shoulders, sore hips, or a stiffening back. The side position is one of the safest sleeping positions, but it only works well in cases where your mattress is well-cushioned to support the pressure points, as well as ensuring that your spine is properly aligned.

In this detailed guide, we are going to discuss the best mattress for side sleepers, ย firmness, and expert tips. This guide is not just about picking the right mattress but making a decision that is for better sleep and improved well-being. At the very end, you will be perfectly aware of what type best matches your body, sleeping pattern, and preferences.

Why Side Sleepers Need A Different Kind Of Support?

When you lie on your side, two things matter most:

1. Pressure relief at the shoulders and hips
2. Neutral spinal alignment

You have to understand that every mattress is different. If youโ€™re choosing a mattress thatโ€™s too firm, then it might not be the right choice for light sleepers. You may feel numb or ache, especially when sleeping in the same position for a few hours. The best choice for side sleepers is medium-soft firmness that provides the right support, softness, and all the benefits you look for in your dream mattress.

What Is The Best Mattress For Side Sleepers In UK?

1. Memory Foam:

What it is: Foam comfort layers over foam support core. (Some come with springs)

Why it works for side sleepers: Exceptional pressure relief that supports shoulders/hips and ensures neutral alignment.

Best for: Top Rated Memory foam mattresses are for people with shoulder or hip soreness, couples needing motion isolation, and sleepers who like a โ€œcuddledโ€ feel.

Look for:

  • Comfort foams with slow-response memory foam blended with air channels or gel infusions for a cooler feel.
  • Edge reinforcement if you sit on the side of the bed often.

2. Pillowtop Mattresses:

What it is: A pocket spring core on top of which a plush pillowtop is placed to provide instant pressure relief.

Why it works:

  • The pillowtop supports your curves
  • Individually wrapped springs keep your spine in place
  • Improves airflow.

Best for: Side sleepers who desire the luxury of a hotel-style plush surface that is more temperature-regulated and has more edge support than most mattresses.

Look for:

  • A properly padded pillowtop mattress (not just a thin quilting)
  • Zoned support

3. Pocket Sprung (Non-Pillowtop)

What it is: Individually wrapped coils with a thinner comfort layer on top.

Why it works: Pocket sprung mattresses contours better than other expensive mattresses.

Best for: Side sleepers who prefer a traditional, responsive feel, with proper edge support.

Look for:

  • Cushions your body's important zones that require the most support
  • Spring count and zoning that match your body type

Quick Comparison Of Mattresses For Side Sleepers

Feature

Memory Foam

PillowTopย 

Pocket Sprungย 

Pressure relief

Excellent

Excellent

Goodโ€“Very Good (depends on top padding)

Spinal alignment

Excellent when medium/medium-soft

Excellent (zoned support)

Very Good

Temperature

Good โ†’ Very Good (depends on airflow foams)

Very Good

Very Good

Motion isolation

Excellent

Very Good

Good

Edge support

Good (reinforced edges help)

Very Good

Very Good

Feel

Hugged/contoured

Plush and comfortableย 

Responsive/springy

Great for

Pressure-sensitive
Cool gel

Luxury plush surfaceย 

Classic feel + airflow

ย 

Firmness & feel: Match To Body Weight & Preferences

Use this as a starting point; personal preference (and pillow height) still matters.

Body Weight

Typical Best Firmness for Side Sleepers

Notes

Under 60 kg

Medium-Medium firm

Extra cushioning prevents shoulder pressure.

60โ€“90 kg

Medium firm

The most common sweet spot for balanced comfort/support.

90โ€“115 kg

Medium firm - Firm

Ensures strong support/zoning.

115 kg+

Firm - Extra firm

Prioritise core support + a pressure-relieving top.

ย 

Does Sleeping Position Matter When Choosing The Best Mattress For Side Sleepers?

Yes, it really does. Now, for a lot of people, this might come as a surprise because they are not familiar with:

  • Mattress types
  • Their unique characters
  • Support features
  • & so much more

As a side sleeper, you obviously want something that:

  • Contours your body
  • Provide personalised support
  • Cushions your zone
  • Keep your spine aligned
  • Ensure motion isolation

This can now be achieved with the help of a memory foam mattress. And for optimal results, we do suggest pairing it with a good pillow that is right for your head and neck. It will not only ensure better sleep but also provide health benefits that we often overlook.

Expert Tips For Side Sleepers

  • Adjust the pillow height: Your pillow size must fit between your head and shoulder to allow the neck to be straight.
  • Go for a knee pillow: A small pillow between your knees minimises rotation of the hips and maintains the neutral position of the spine.
  • Alternate position: It is necessary not to sleep on the same side all the time, as it may cause unequal pressure on the shoulders or hips.
  • Select breathable bedding: Side sleepers tend to get warmer because they have more surface contact with a mattress. The sheets made of cotton, bamboo or Tencel โ„ข assist in regulating the temperature.
  • Keep shoulders comfortable: In case of shoulder strain, take a small hug of a pillow or body pillow to have straight shoulders and alleviate strain.

Care & Rotation Schedule

Task

Frequency

Why

Rotate head-to-toe

Every 1โ€“3 months

Evens out wear and impressions.

Mattress protector wash

Monthly (or as needed)

Hygiene
Keeps top layers fresh.

Surface vacuum

Monthly (or as needed)

Reduces dust/allergens.

Check base/fixings

Twice yearly

Keeps support even and squeak-free.

ย 

What Type Of Bed Is Recommended For Side Sleepers?

The issue is not only about the mattress itself, but also about the bed base you will use, which will determine the quality of your mattress. The solid and supportive foundation is important to side sleepers because it guarantees that the mattress will be able to shape correctly without cratering and losing support.

Furniture such as a divan bed frames can provide a firm and even surface that goes well with pressure-relieving mattresses. Upholstered beds with heavy slats or with a platform base are also very supportive, as well as adding a nice touch to the bedroom. The objective is to get a flat, even surface that will enable the mattress to perform its purpose: to cushion the shoulders and hips and to hold the spine straight. Combining the right mattress type with a supportive bed frame forms an ideal support for good sleep.

How To Manage Temperature As A Side Sleeper?

Temperature regulation is something that should be on your mind when choosing a mattress as a side sleeper. Hybrids and pocket-sprung mattresses are best due to the coil core that allows free flow of air to keep the sleep surface cool. Foam mattresses can be warm, but this can be fixed by:

  • Using breathable sheets
  • Gel infusion memory foam
  • Avoid heavy synthetic fabrics

In case you like the feel of the contouring of memory foam, but cannot cope with overheating, a pillowtop with a memory layer is the perfect choice for your sleep.

Motion Isolation & Couples

In the case of couples, the transfer of motion can either make or break a good night's sleep. Motion isolation is the most significant feature of memory foam as it can absorb the movements and they do not cause any disturbance to the partner. Pocket-sprung mattresses also do well, especially those that have thicker layers of comfort that allow movement to be absorbed before the springs.

FAQs

What firmness is best for side sleepers?

The most common firmness that experts recommend is medium-soft to medium. There are other factors by which the firmness can increase, like:

  • Youโ€™re a heavy sleeper
  • Wants more pressure relief
  • Sleep with a heavy partner

Do side sleepers need a special type of pillow?

Yes, pillow height should fill the space between the head and the shoulder.

  • Average builds: medium loft (10โ€“12 cm)
  • Broad shoulders: higher loft (12โ€“14 cm)
  • Narrow shoulders: lower loft (8โ€“10 cm)

How do I know if my mattress suits side sleeping?

Lie on your side and check the following:

  • Your spine should look straight
  • Youโ€™re not sagging
  • No sharp pressure on shoulders or hips
  • Able to change position easily without strain
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