TheraPur ActiGel® Hazen Mattress Rated 4.46/5 based on 24 customer reviews
TheraPur ActiGel® Hazen Mattress helps with

TheraPur ActiGel® Hazen Mattress

Add to product comparison
gel mattresses anti allergy mattresses Firm mattresses
Questions: Read 5 Questions
4.5/5 - Read 24 Reviews
sleeping cat
16p per sleep based on average mattress lifespan
Single3' x 6'3
Small Double4' x 6'3
Double4'3 x 6'3
King Size5'0 x 6'6
Super King6'0 x 6'6
With Divan Bed Set
With Ottoman Bed Set
*We work directly with retailers to secure the best deals, outgoing links are monetised
snooze score logo Find out if the TheraPur ActiGel® Hazen Mattress is suitable for you by answering 4 simple questions. Take the quiz

Why Our Sleep Experts Loved It

becky says

Introducing TheraPur ActiGel® Hazen Mattress, the latest in a growing line of mid-high quality mattresses from the internal brand Therapur. Unique to Dreams this mattress has a lot to offer at a keen price point. Interested to learn more? Let's dive in.

Let's start with the support layer, this sits at the base of the mattress and is what typically makes contact with the base of your bed and houses all the support your back and neck need. In this instance, a firm tension bonnell spring that has been used previously for orthopaedic support thanks to its fair body contouring properties and reasonable price point. This spring support base is more mid-range than premium, however, it is great for the price point and should last a number of years without any discomfort.

Onto the comfort layer and this is where Therapur really shines with its unique ActiGel comfort layer of luxurious quantities which offers many of the comfort properties of memory foam with non of the downsides. Predictably with gel, this layer proves far more breathable than other comfort options in other products and does a great job of offering comfort while keeping you cool. Ultimately we find the ActiGel layers to be ideally suited to those looking for an all-season mattress that will suit all temperatures.

Reviews are still coming in for this product as it is particularly new however, we have experience with the Therapur range at this point and have no doubt this will become a quick fan-favourite thanks to its great price point paired with reliable and comfortable ActiGel.

How does it feel?

Firmness of The TheraPur ActiGel® Hazen Mattress depends on bodyweight. Adjust your weight below to get an indication of how it may feel. Remember though that firmness is entirely subjective.
weight description image

Reasons to Buy

ActiGel is one of my favourite comfort layers, it works really well.

A brand you can trust from the most popular mattress retailer in the UK.

Price point is more than reasonable.

Numerous sizes available.

Reasons to Avoid

Long lead time is disappointing and somewhat the norm for many mattresses from this retailer. They make up for it in great customer service and quality but you do have to plan ahead a fair bit.

Key Performance Indicators KPI question mark
Of The TheraPur ActiGel® Hazen Mattress
Our Key Performance Indicators are produced using a combination of specification-heavy algoritmic data points and user reviews.

Key Performance Indicators KPI question mark

Our Key Performance Indicators are produced using a combination of specification-heavy algoritmic data points and user reviews. For example, a firm pocket spring support layer is more breathable and offers better back support but may prove unsuitable for side sleepers, the reverse is true for a soft-medium tension reflex foam support layer. This is one of 100+ datapoints considered when generating the below ratings.


*Assuming average weight, suitability will vary dependant on body type, use the quiz above for a more tailored guide.
  • Back Sleepers
  • The amount of support offered from a mattress will vary depending on the firmness of the tension and the type of support layer used. Based on a person of average build.
  • Side Sleepers
  • If you sleep on your side you typically need a supportive tension that is not too firm, nor too soft. This is because your hips and shoulders need adequate sinkage.
  • Stomach Sleepers
  • Stomach sleepers need a reasonable amount of tension in the base support layer to adequately offer body contouring and help prevent aches and pains. Results will vary based on your build.


  • Breathability
  • Mattresses that feature breathable materials help promote airflow and keep you cool making for a more hygienic night's sleep.
  • Stability
  • Depending on the type of support layer in place can have an impact on stability, edge to edge support and roll together prevention. Pocket springs of a firmer tension will have better stability than open coil soft tension, for example.


  • Initial Odour
  • Materials in mattresses, particularly memory foam and rolled bed-in-a-box mattresses can have an initial odour, this is typically short term and reduces considerably within 24 hours.
  • Long Standing Odour
  • Certain materials inside different mattresses can produce a small odour. Typically this is short term rather than long standing but there are minor exceptions.

Brand Rating

  • Overall Brand Rating
  • This is based on community driven customer reviews tied to product reviews and grouped together at a brand level to produce a score.
Of The TheraPur ActiGel® Hazen Mattress
Brand: TheraPur
Retailer: Dreams
Delivery Time: Average
Delivery Charge: Excellent
Customer Sentiment: Good
Guarantee: Average

Calendar Icon Radar Analysis Radar Analysis Question Mark

Radar Analysis looks at the product, brand and retailer against base norms established within the industry and determines where the product sits by way of established performance metrics.

What Makes The TheraPur ActiGel® Hazen Mattress Great?

Firm comfort grade

Firm tension mattresses are most often suited to those who need a bit more support, typically for their back and neck. Mileage will vary depending on your weight and BMI as the tension and how it feels will ultimately be impacted as such. We also see firm mattresses been commonly recommended for their orthopaedic support. Ideal for back and stomach sleepers, although heavier people may find it suitable..

2cm of ActiGel® foam for improved support, airflow & temperature regulation

Traditional memory foam has one critical pitfall around heat retention and buildup. See, the foam absorbs heat and is not particularly breathable meaning that it can cause many people to get too warm as they sleep. Cooling gel foam is different however featuring all the positives of traditional memory foam but without the pitfalls of heat build up. It's a great option for those who find comfort in the foam.

PurFibre® layers for enhanced comfort & support

Purfibre is unique to Therapur and is layered horizontally within the mattress, featuring better than average rebound and recovery properties similar to memory foam. This layer also provides superior support which can help prevent pain and stiffness.


This product is unlikely to cause any sort of allergic reaction. Ideal if you suffer from any sort of allergy problems

Online only

This mattress is not sold in stores and is instead an online-only model. That works quite well for us, since our core line-up or reviews and specification highlights are all based around online models.

Made in the UK

These are made and manufactured in the UK, meaning that they all meet the same exceptional quality and durability that we expect from genuine UK manufacturing.

Comes with our 40-Night Sleep Guarantee

The 40 night sleep guarantee is great as it allows you to exchange the product if you are not completely satisfied. This was one of the final challenges for online retailers to overcome comparable to traditional bricks and mortar where you can trial the product in store. Buy with confidence on this model.

Rest easy with a 1-year guarantee

A one year guarantee is suitable for many as the vast majority of problems that may occur often do so within that first year. At the same time, more and more retailers are beginning to offer multi-year warranty and guarantees although these often come at a slightly higher price point on average.

Load more specifications

Customer Reviews For The TheraPur ActiGel® Hazen Mattress

Based on 24 reviews
Great firm mattress

I love a firm mattress and this one is very comfortable! I was sceptical about the Actigel providing too much cooling as I don't like to be cold in bed, but it really does make a difference to the temp when in bed. It's not too cold at all. Hopefully will be lovely and cooling in the summer months. I would recommend this mattress to anyone looking for a comfortable firm option, at a very reasonable price. So far has provided the perfect night's sleep with maximum support.

top quality on a budget

What a great mattress, my daughter has been on memory foam her whole life and I changed things up recently to this mattress. Boy this is super comfy great price she loves it. I am a big chap myself and even I thought this is very comfortable for a very large adult. I am very critical personally and I wanted to find a reason and reason to change to something firmer really but nope not needed this is exceptional value for money and I am over the moon with the quality.

Great value and service from start to finish

We compared this mattress to other 'trendy mattress brands' which are actually thinner. This is a lovely deep mattress, it is very firm (which is what we prefer). Great night's sleep, which I am sure will be even better as we get used to our new purchase. The delivery process including recycling our old mattress was seamless, we were kept informed throughout the purchase cycle. Highly recommend Dreams and this mattress

Supportive & Comfortable

This mattress offers a great firm support, whilst also providing an extreme level of comfort. The actigel is working well in regulating our temperatures, especially whilst the heating is currently on - thankfully not too hot nor cold! The price is more than reasonable given that you have fantastic support and comfort!

New Sleigh faux leather bed and therapur mattress

We have only had it a few weeks but sleeping like babies so far. As the weather is so cold cant be sure about the cool aspect but it is definitely comfortable and I ache a lot less in the mornings which is a good sign. The delivery experience was excellent. Third dreams product and loving it so far.

Comfy ??

I've had this mattress about 3 weeks now and it's super comfy. Took me a long time to decide on a mattress and it can always be a gamble online but this one has not disappointed :) not sure that I feel the benefit of the cool gel but I am happy with my purchase.

Great mattress

I'm very happy with my purchase. I was worried I would be too cold as the matress has a cooling gel layer and I'm usually freezing, but it's actually very nice. Great firmness as well, I can already tell my back is in less pain. 10/10 would recommend.

Great firm support

The Hazen provides great firm support with the PurFibre layers providing extra comfort. The ActiGel foam keeps you cool throughout the night, all year round, meaning you wake up feeling fully refreshed.

Therapur Actigel Hazel Mattress

Excellent mattress, so comfortable!11. I usually wake up with pains in my back,hips and knees, but this has reduced greatly since purchasing this mattress. Excellent price as well

Best mattress ever

This is the second TheraPur mattress I have purchased from Dreams. They are so comfortable. 1 saw my son through some of his time in the armed forces and its still super comfy

Quality mattress

Not as firm as I expected but turned out to be perfect for me. Can't stand memory foam but this mattress is great, no over-heating or getting stuck in 1 position.

Good quality and price

My wife and me like this mattress very much. It is comfy, still on the cheap side, I no longer has pain in my sides if I don't turn around mid-sleep.

The TheraPur ActiGel Hazel Mattress

This bed has made my sleep much better. It is so comfortable I wouldnt be without it. I would recommend it to anyone, its amazing

Fanatic quality at a great price!

Fanatic quality at a great price. This mattress is not only comfortable but also gives a quality firmer and supportive feel.

Dream Mattress

Took a few nights to get used to, but its fantastic. I can feel my muscles relax into the mattress at night!

Maximum Comfort & Support

This mattress is firm and extremely supportive, with a great level of comfort from the actigel foam topper.

Comfy bed

This bed is very comfortable and good value for money , it's not too hard or too soft which is great!

Lovely comfortable mattress very pleased with it

Lovely comfortable mattress very pleased with it , I would Highley recommend this.

would buy again

great mattress very comfy and cool, delivered on time and to the room of my choice

Pretty good mattress.

Decent mattress. Slightly on the warm side, but thats no problem for us.

Excellent mattress

Excellent communication and on time delivery. Superb comfort . Thank you

Load more reviews
Leave review

Questions and Answers About The TheraPur ActiGel® Hazen Mattress

Prospective customers had the following questions about the product

Would this mattress be suitable for a couple who weigh totally differently (e.g. 20 stone and 8 stone) Also would there be a lot of movement if one of us got up and is it likely to dip because of the weight difference? Many thanks, Michelle.

Answer: As this is a traditional spring mattress you would be more likely to feel partner movement compared to a pocket sprung mattress.With any weight difference, as long as the mattress is rotated regularly this should evenly distribute the settlement.Many thanksJSDreams

Hello, do all Therapur matresses have a fire safety label attached? Thank you. Mariam

Answer: All of the TheraPur mattresses have a fire safety label attached.Many thanksJSDreams

Can the therapur actigel hazen mattress be used on an adjustable bed?

Answer: This mattress cannot be used on an adjustable bed.Many thanksJSDreams

What is the firmness rating of this mattress

Answer: This mattress has a firm comfort grade.Many thanksJSDreams

Load more questions
Ask question

Product Relevant Videos

Video material related to the specifications of The TheraPur ActiGel® Hazen Mattress

Benefits of Gel Mattresses
Benefits of Gel Mattresses
By BedStar
Firm vs Soft Mattress
Firm vs Soft Mattress
By BedStar
What is Hypoallergenic?
What is Hypoallergenic?
By Karen Kelley Perkins

Customers Also Purchased View More From Dreams

Latest Advice and Guides Your Questions Answered

Everything You Need To Know About Mattress Fillings
Soft and Squishy Memory Foam
Simple Mattress Buying Guide