With this 30 cm deep body adaptive hypoallergenic mattress, you will experience a satisfying sleep. Made from an innovative combination of our pressure relieving High Performance Advanced Sleep Catalyst Foam with Pi-Cut Air Dispersion Channels® Technology, this ergonomic mattress will:

enhance the quality of your sleep
exceed the need for a contoured support to your spine whilst providing you with a supreme comfort
keep you comfortably cool and dry as result of enhanced ventilation and effective moisture dispersion

This medium firm ergonomic mattress will contour to your body for:

even distribution of your weight for an outstanding pressure relief from shoulders, back, hips and legs for refreshing sleep
elimination of movement disruption for an unperturbed sleep
preventing numbness so that you do not suffer from nightmarish tossing and turning in your bed
Research for Sleep, Health and Well-being Product of a full-fledged research and a continuous engineering efforts in which the factors of paramount importance to sleep, health and well-being were tested and analysed to optimise its performance and ergonomics features that meet or exceed the British and the European Standards
Design, Development and Manufacturing in the UK Exclusively designed, developed and manufactured in the UK using an advanced intelligent mattress production technology to:
impart a top notch quality and stability to exterior and interior structures
provide celestial comfort and soft pleasurable support to your body for freshness, cleanliness, luxury, well-being, durability and an elegant craftsmanship
immediately distribute your body weight properly for crucial pressure points relief
support the UK economy
Comfort Core The comfort core consists of our independently proven pressure relieving High Performance Advanced Sleep Catalyst Foam which is soft and elastic and moulds to your body contours for a great sleeping experience. Unlike an ordinary memory foam, its body adaptive performance does not depend on temperature and therefore the mattress remains highly comfortable throughout the year.


Sleep Catalyst Foam
with Pi-Cut Air Dispersion Channels® Technology which is designed to offer comfort and support whilst enhancing the air circulation through the mattress core for a cool and dry celestial sleep. Furthurmore, it actively responds to any difference in weight and size of sleeping partners which prevents sleep disturbance and roll-off.

Affluent Soft Cover Premium quality extremely comfortable luxury cover provides a blissful soft comfort
Foundation This mattress can be used on any suitable type of foundation, however we recommend Avax foundation with our mattress to prolong its performance and life
Environmentally Friendly Various components can be recycled at the end of mattress usage to develop other important products after due hygienic and other necessary treatments
Fire Safety Compliance Complies with the UK Fire Safety Regulations
Extended Guarantee 5 year guarantee and 5 year warranty to provide a 10 year extended warranty
Mattress Firmness

Medium Firm (Ergonomic – see our Support Level Matrix)

Ideal mattress firmness for side and back sleepers
Relieves pressure points on your body
Helps distribute your weight on a wider area
Helps the blood circulation
Prevents numbness
Provides comfortable upholstery for sleeping surface
Sleeper remains in the same sleeping position for a longer period of time which reduces tossing and turning
28 cm Mattress Depth
25 cm is the ideal mattress depth required for 91% of the UK population. This mattress exceeds the depth required for the British population making it a very good choice for UK bedrooms
A well designed royal depth makes this mattress more sumptuous and luxurious and gives you a more comfortable night whilst providing the perfect support you need to sleep blissfully well
Enhances your high-tech sleep experience with the rich balance of luxury and support
Premium Grade Nemo°Cool® Bamboo Cover
Incredibly soft with luxurious feel
Antibacterial (perfect for sweaty sleepers), antimite, antifungal and deodorising to help reduce the bacterial, mite and fungal counts and keep the mattress fresh
Hypoallergenic for sensitive skin
Antistatic and therefore highly relaxing to your skin and rejuvenating sleep
Wicks moisture away from your skin to keep you comfortably cool and dry
Highly breathable for cool and comfortable sleep
Performs exceedingly well in all the temperatures
Environmentally friendly bamboo fibres
5 cm High Performance Advanced Sleep Catalyst Foam Technology
Enhances your sleep quality as you fall asleep fast and experience deep sleep
Provides a fully optimised sleep for improving blood flow, relieving body pressure points, relaxing muscles and reducing your body pains and aches
Offers the best of comfort while remaining neutral to the body and ambient temperatures
Prevents pressure ulcers (pressure sores) to keep your skin smooth and dry
Provides a weightlessness sleeping experience due to high micropores density
Prevents motion transfer of partner for undisruptive sleep
Hypoallergenic and hygienic for sensitive skin
Wicks moisture away from your skin to keep you comfortably cool and dry
23 cm High Performance Advanced Sleep Catalyst Foam Technology with Pi-Cut Air Dispersion Channels® System and Ergobatic High Performance Body Support Core System®
Balances out the weight, shape and size differences between the sleeping partners
Moulds to your body and holds its shape
Provides a zonal and ergonomic support in conjunction with the comfort core – extended support in lumbar region and softer support at hips so that your posture is protected and the spine remains in alignment
Relieves your body pressure points to sooth you to a relaxing sleep
Regulates the air flow through the core to keep you comfortable and cool
Provides an excellent comfort and supreme support to your body
Hypoallergenic and hygienic
4 Handles
Make it easy to rotate the mattress
100% Egyptian Cotton Quilted Side Panel (Mattress Border)
Softer and lustre feel
Highly breathable for cool and comfortable sleep
Strong and durable
Zero Turn Mattress
Sleeps on one side only
Rotate the mattress regularly to prevent the sagging (acceptable indentation is 5 cm during 5 year of guarantee)
Knitted Bamboo Cover
Tape edged to secure it permanently for harvesting a quality comfort
Provides you with a formidable comfort while improving your sleep standard
Creates a dynamic cool sleeping surface for comfortable sleep
Cuddles your bones properly for marvellous body pressure relief and a personalised soothing support
Provides physical stress and body pain relief
Imparts total body support
Allows for a proper spine support
Facilitates cool and dry blissful hypoallergenic sleep
Individuals with their body weight up to 25 stone
Couples with their combined body weight up to 50 stone (100% of UK couples)
Individual and couples with flat body shape and even weight distribution
Individuals and couples with average body shape and weight distribution
Individuals and couples with curvy body shape and uneven body weight distribution (having more defined and pronounced hips, shoulders and stomachs)
N.B.
Weight holding capacity of this mattress is approximately 25 stone per sleeping side
Body weight and shape given above is for guidance only. Your preference may vary
Select Spring

1500, 2000, 3000

Select Size

UK Single (90cm x 190cm/3'0" x 6'3"), UK Small Double (120cm x 190cm/4'0" x 6'3"), UK Double (135cm x 190cm/4'6" x 6'3"), UK King (150cm x 200cm/ 5'0" x 6'6"), UK Super King (180cm x 200cm/6'0" x 6'6")

Select Base

UK Single (90cm x 190cm/3'0" x 6'3"), UK Small Double (120cm x 190cm/4'0" x 6'3"), UK Double (135cm x 190cm/4'6" x 6'3"), UK King (150cm x 200cm/ 5'0" x 6'6"), UK Super King (180cm x 200cm/6'0" x 6'6")

Select Ottoman

UK Double (135cm x 190cm/4'6" x 6'3"), UK King (150cm x 200cm/ 5'0" x 6'6"), UK Super King (180cm x 200cm/6'0" x 6'6")

Select Sleigh Bed

UK Double (135cm x 190cm/4'6" x 6'3"), UK King (150cm x 200cm/ 5'0" x 6'6"), UK Super King (180cm x 200cm/6'0" x 6'6")

Storage Option

Non Drawer, 2 Drawer, 4 Drawer, 4 Drawer Continental, Foot End Jumbo Drawer, Sliders

1 review for Colossal X

  1. My sleep has never been better thank you @AvaxMattresses deep better quality sleep in less pain – my fragile muscles and joints are supported well during sleep – would really recommend to anyone with Ehlers Danlos Syndrome – chronic pain @ehlersdanlosuk #BetterQualityOfLife

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