Kally Ultimate Side Sleeper Pillow Review UK – 2022

Kally Sleep Ultimate Side Sleeper Pillow








Material Quality


Value for Money



  • The whole pillow is machine washable
  • The pillow comes with a 14-night sleep trial
  • Suits side sleepers perfectly


  • Will be suitable but not perfect for anyone but side sleepers
  • May be too soft for some people

Kally is a relatively new company. Only launching at the end of 2018. They specialise in pillows that are back by a large amount of research and each has a specific purpose. Each pillow is designed after talking to a wide range of health professionals. This has given Kally Sleep a clear idea of what causes common sleeping issues and how to solve them. 

As you can see from this pillows name, it is designed to give side sleepers the best quality of sleep possible and avoid the development of aches and pains.

Alongside the Ultimate Side Sleeper Pillow, Kally has now launched a wide range of different pillows. These include a full-body pillow and pregnancy pillows. All of these have a specific purpose and aim to provide the sleeper with as much support and comfort as possible for their specific purposes. 

As a result of the large amount of research showing the different needs of each sleeping style. The Kally Ultimate Side Sleeper Pillow is designed to suit side sleepers and give them an excellent balance of comfort and support. It has been developed to prevent aches and pains from developing when you sleep. 

With a long list of claims, we believed this pillow was worth breaking down further. We have taken a deep look into whether or not this pillow does what it claims.

Kally Sleep Ultimate Side Sleeper Product information

Kally Sleep Box Shaped Pillow - Side Sleeping & Neck Support - 70 x 40cm - White (Machine washable)
  • WALLED SIDES: The walled side shape has been designed to provide...
  • BOXED SHAPE: allows the generous amount of filling to be evenly spread...
  • PREMIUM QUALITY: Made with hypoallergenic hollowfibre and finished off...








70 x 40cm






View the latest price at Kally Sleep here.


Available next day through Amazon.

Kally Ultimate Side Sleeper Pillow model
Credit: Kally Sleep

Construction and Materials

The construction of the Kally Side Sleeper pillow looks relatively simple in its colour scheme and design. That’s pretty much because it is. Its main feature that sets it apart is its walled sides. This keeps the fillings evenly distributed and ensures that it keeps its shape for an extended lifespan. Another benefit of the walled sides is that it gives the pillow extra loft so it is well suited to side sleepers who benefit from a higher than average pillow. This avoids excess strain on the neck and back, keeping the spine in good alignment. 


1. Cotton Mix Cover Layer

The cover layer of this pillow is a very traditional cotton blend. This gives it a very soft finish while remaining breathable. An additional bonus is that the pillow is hypoallergenic. Great news overall for those who suffer from allergies or are prone to overheating.

The whole pillow, not just the cover, is machine washable so you can easily throw it in the washing machine and keep it hygienic very easily. 

Kally Ultimate Side Sleeper Pillow layers
Credit: Kally Sleep

2. Hollowfibre Inner Core Layer

Hollowfibre fillings are very common in pillows, chances are that you already own a pillow with this inside. It provides a good fill that leaves the pillow well stuffed and not sagging or flattening too quickly. It gives the pillow a medium firmness feel which is slightly softer than most memory foam pillows but still gives plenty of support. The hollowfibre material is also very breathable. Keeping you cool and free from overheating as you sleep. 

Good news for those who suffer from allergies. Each pillow is treated to ensure that it is hypoallergenic. This along with being able to wash the entire pillow may make it a great choice for those with dust mite allergies. One thing to note though is that it can’t be dried in a tumble dryer as it may lose its shape. It should be air-dried only. 

Kally Ultimate Side Sleeper Pillow angle
Credit: Kally Sleep

Comfort, Support and Sleep Quality

The Kally Ultimate Side Sleeper pillow is a medium firmness pillow. Its boxed walls ensure that the hollowfibre fillings are evenly spread inside the pillow, giving a balanced feel meaning you don’t need to shift and fold the pillow to get the best from it. It also means the support received is consistent, avoiding neck aches and pains.

The extra depth of the pillow lends itself to suiting side sleepers the best. This is because it supports the increased gap between the shoulder and head in this position. The loft and fillings give it an excellent balance of comfort and support which will allow you to get a restful and comfortable night’s sleep. If you sleep in other positions then you still maybe like it but other pillows are likely to suit you. 

If you sleep on your stomach, especially, then this will be especially noticeable and may cause excess strain on your back and neck. 

Kally Ultimate Side Sleeper Pillow side
Credit: Kally Sleep

The walled support also means the pillow has an excellent edge to edge support, allowing you to sleep on all parts of the pillow with equal effect. It also supports a healthy spinal alignment by avoiding excess neck strain which can lead to long term problems. Proper spinal alignment may also bring other benefits such a reduction in snoring, probably more one for the partners! 

Trial and Guarantee

As with most pillows, the Kally Ultimate Side Sleeper pillow does not come with a trial. It does have a good guarantee that comes with it, however. In addition to this Kally Sleep has a good support team who are happy to help with any problems that you may face with this pillow.

Kally Ultimate Side Sleeper Pillow
Credit: Kally Sleep


Free delivery comes with this pillow ordering through Kally or Amazon. It can also be found with a few major retailers and so delivery will depend on their policies.

Our Verdict

To summarise, the build of the Kally Ultimate Side Sleeper pillow is relatively simple. This is to be expected as it is for a specific purpose and not a one size fits all pillow. It is built for those who sleep on their side and it does this job well. Giving a medium firmness feel, it provides a good balance of support and comfort. The loft and walled sides are the features that lend it to suiting side sleepers mainly as it will keep you well balanced when sleeping this way while supporting the neck at a good height. This promotes a healthy spinal alignment. The cover gives it a soft, luxury finish and a comforting feel. 

Credit: Kally Sleep

Coming with free delivery and a good support system it adds to buying confidence. A guarantee always boosts this as well. 

The cost of the pillow is quite a substantial amount for a hollowfibre pillow. The extra features such as the walled sides improve side sleeping quality quite considerably. 

Buying a pillow specifically for a certain sleeping position is certainly a more recent idea but it makes a lot of sense and if it can improve sleep quality then it is surely worth it and going on the features built for side sleepers, it likely will.

To conclude this review, the Kally Ultimate Side Sleeper pillow is fit for purpose and is a very interesting product. It is a great choice if you are looking for the following:

  • A pillow which promotes a healthy spinal position while sleeping on your side.
  • A pillow made in the UK to a very high standard
  • A medium firmness pillow
  • A hypoallergenic, machine-washable pillow 

Last update on 2024-05-23 / Affiliate links / Images from Amazon Product Advertising API