The Science Bit: Hidden Technology

How Our Clothes Work

We use some of the most advanced fabrics in the world to keep you warm in winter, cool in summer, fresh all day and thrive on low maintenance. Our autumn/winter collection uses ThinHeat™ fabrics for enhanced warmth, whereas our spring/summer collection uses CoolFresh™ fabrics to ensure you stay cool. Our woven trousers are also rain resistant and stain proof. Please click any of the sub sections below for more information. Alternatively sign up to our newsletter to keep up to date with news and special offers.

Warm Collection : ThinHeat

Thermal clothing is always cosy, but it's usually unfashionable (think thermals that your granny used to wear). Our new age ThinHeat™ heat generating clothes use new soft touch fabrics with on-trend designs. We have a whole host of tops (not just a plain tee - though we do that too!) and we believe we have designed the world's first thermal dresses, trousers and blazers.

To state the obvious, many of our customers love our clothes as they want to keep warm. We're also trying to do much more. We love wearing layers but we don't like loads of bulky layers where you can't put your coat on or look like a hulk! We believe our on-trend designs help in a new lifestyle where you can look sleek without the bulk! Here's the science: 

Keep you twice as warm as wool or cotton.*
Our fabric is inspired by nature, polar bears to be precise! Their fur has "hollow" hairs to keep them warm, we mirror this effect with engineered hollow-core fibres that trap air for greater insulation.

 

All images in this section are from Thermolite®, a registered trademark of Invista. For illustration purposes only. Fiber shape and content may vary.

Regulate your temperature.
The fabric's thermobuffering properties protect you from temperature changes, for example regulating your temperature if there is a chill.

 

Minimise clamminess with breathable fibres and wick away moisture around 1.5 and 3 times faster than wool or cotton.
The larger surface area of the hollow-core fibres allow for faster evaporation by speeding moisture away from the skin to the surface of the fabric where it can evaporate quickly.

  

 

Minimise odour with built-in anti-bacteria silver ions.

 


Stay thin! A mix of hollow core and multichannel fibres add warmth without weight.
Because these fibres are so insulating, they make even the lightweight materials we use toasty warm.



Dry 50% quicker than cotton.


 

 

 

Thrive on low maintenance.
Our fabrics are easy care. They don't need ironing, tumble drying or hot washes.
  We believe it is unique; no one offers cotton-touch, on-trend clothes using the technologies we do. The technology we use have been adapted from sports, outdoor wear and work-wear.
Warm Socks

HotSquash socks are super warm and slim enough to fit into everyday shoes and boots. They're made from Isolwool ®, a mix of Isolfil ® and wool. The man behind Isofil ® won the Nobel Prize for chemistry for it, so never let it be said we take our socks lightly! In fact, all our socks:

Keep you much, much warmer than wool or cotton.
Isolwool ® traps a layer of warm air against your skin. The other secret to our socks' cosiness is Isolfil's ® extremely low thermal conductivity rating of 6, compared to cotton's 17.5.

 

Lower the rating = highest insulation properties
Source: Isolfil ®: the key to comfort brochure, Thermal conductivity chart

Minimise clamminess with breathable fibres and wick away moisture.
Isolfil ® wicks moisture away and it evaporates. Isolfil ® is around 160 times less absorbent than cotton and 8 times less absorbent than polyester, its nearest competitor.

 

Lower the rating = highest insulation properties
Source: Isolfil ®: the key to comfort brochure, Moisture regain chart

Stay thin! A mix of hollow core and multichannel fibres add warmth without weight.
Isolfil ® is one of the lightest fibres known to man. For the geeks out there, it has a gravity of 0.91, compared to 1.32 for wool, 1.54 for cotton and 1 for water.

 

Source: Isolfil ®: the key to comfort brochure, Specific Gravity regain chart

Dry much quicker than cotton.
Again Isolfil ® is around 160 times less absorbent than cotton and 8 times less absorbent than polyester.




Thrive on low maintenance. They don't need ironing, tumble drying or hot washes.





Last longer and are very durable.

To quote the jargon, Isolwool ® has very high resistance to mechanical stresses such as abrasion, stretch tear and tensil forces. In tests by Meraklon, Isolwool's manufacturers, the fabrics lasted an average 5 times longer. More importantly, they've gone down a storm in our wearer trials!


Are highly resistant to stains and dirt.
As a result of high abrasion, IsolWool ® is highly resistant to stains and dirt.

 

In addition, our socks come with flat toe seams for additional comfort. To ensure the most comfortable fit without irritation at the toes, we use linear-looped seams. These "no feel" toe seams are flat and smooth against the foot.

Clever fabric

HotSquash has a warm and cool collection, but some of our clothes are just very clever! They help regulate your body temperature, helping you to not get too hot or too cold. They are also anti-odour and quick drying.

We promise our Clever clothes will: 

Regulate your temperature.
The fabric's thermobuffering properties protect you from temperature changes, for example regulating your temperature if there is a chill or it is too hot. NASA (and chef's!) use this technology. HotSquash has developed lovely soft touch fashion fabrics so you can look fantastic.

 

 

All images in this section are from ADVANSA ThermoCool®, the Duoregulation™ fibre technology. For illustration purposes only. Fiber shape and content may vary.


Minimise clamminess with breathable fibres and wick away moisture much quicker than wool or cotton. The larger surface area of the special four channel fibres allow for faster evaporation by speeding moisture away from the skin to the surface of the fabric where it can evaporate quickly. HotSquash's Clever technology wicks away moisture 48% better than a similar competitor and approximately 10 times better than cotton.

 



Dry twice as fast as comparable fabrics. 

 

Minimise odour with built-in anti-bacteria silver ions.



Stay thin! 
The mix of multi-channel and hollow fibres create a lightweight fabric.



Thrive on low maintenance. 
Our fabrics are easy care. They don't need tumble drying, hot washes and require little ironing.


We believe it is unique; no one offers cotton-touch, on-trend clothes using the technologies we do. The technology we use have been adapted from sports, outdoor wear and work-wear.

All statistics are approximate.

Cool Collection: CoolFresh

Our spring/summer clothes are made from soft, technologically advanced fabrics, CoolFresh™. They'll keep you cool and fresh all day long, but most importantly, they'll keep you looking absolutely gorgeous!  Please sign up to our email newsletter for more news and promotions.

We promise our CoolFresh™ clothes will:

Keep you cool and fresh.* CoolFresh™ fabric is a combination of multi-channel and hollow fibres. The multi-channel fibres keep you cool, while the hollow core fibres react to your body's temperature to take the chill off. The aim is to keep you at a comfortable temperature no matter what you do.

All images in this section are from ADVANSA ThermoCool®, the Duoregulation™ fibre technology. For illustration purposes only. Fiber shape and content may vary.

Minimise clamminess with breathable fibres and wick away moisture much quicker than wool or cotton. The larger surface area of the special four channel fibres allow for faster evaporation by speeding moisture away from the skin to the surface of the fabric where it can evaporate quickly. CoolFresh™ wicks away moisture 48% better than a similar competitor and approximately 10 times better than cotton.



Dry twice as fast as comparable fabrics.


Regulate your temperature.
The fabric's thermobuffering properties protect you from temperature changes, for example regulating your temperature if there is a chill.

 



Minimise odour with built-in anti-bacteria silver ions.



Stay thin!
The mix of multi-channel and hollow fibres create a lightweight fabric that's ideal for spring and summer.

Thrive on low maintenance.
Our fabrics are easy care. They don't need tumble drying, hot washes and require little ironing.


We believe it is unique; no one offers cotton-touch, on-trend clothes using the technologies we do. The technology we use have been adapted from sports, outdoor wear and work-wear.

All statistics are approximate.

Additional information about our socks
Our spring/summer socks are here to keep your feet cool and comfortable. They are also made from Coolmax® fabric (a registered trademark of Invista) so they do all of the above, plus they come with these great features:

Flat toe seams for additional comfort.
To ensure the most comfortable fit without irritation at the toes, we use linear-looped seams. These "no feel" toe seams are flat and smooth against the foot.
Special vents to help them breathe.

Cool & Rain Repellent: All year Woven Trousers

Although the designs of our trousers in our spring/summer and autumn/winter collections are different, all our trousers use 3XDRY® technology. This means they are rain repellent, stain repellent, breathable, quick drying and low maintenance. So you don't need to worry about things like unexpected rain showers, changing if you're cycling to work, or even sticky little handprints! They also:

Minimise clamminess with breathable fibres and wick away moisture from the skin permanently.
This also greatly reduces perspiration marks.

 

Source: 3XDRY ® presentation, page 6, tests on a sample fabric applied with 3XDRY

Dry 6-8 times quicker than without 3XDRY ® Treatment



 

Source: 3XDRY ® presentation, page 9

Thrive on low maintenance. No need for tumble drying or hot washes.





Protect against rain and stains.
3XDRY ® technology coats the fabric outside with a water/stain repellent function, and absorbs perspiration on the inside.

 

 

Source: 3XDRY ® presentation, page 3

Last longer and are very durable.
The technologies we use are also used in tough and durable outdoor and work-wear fabrics. Although the fabrics we use have been adapted for fashion, our feedback show they are tougher and longer lasting than trousers made from pure cotton.

Our trousers conform to the bluesign ® standard, the world's most stringent production standard in terms of environmental, health and safety requirements.

Fabrics, technology and sustainability

Why is HotSquash different?

We believe we are unique; no one else offers cotton-touch, on-trend clothes using the technologies we do.

What are HotSquash fabrics made from?

Most of them are what's called 'next generation' man-made fabrics, or a mix of man-made and natural fibres. This means they're soft, luxurious and breathable, and can do things like regulate your temperature. There's also good evidence that they're better for the environment as most can be recycled, they're long lasting, low wash, non-iron and don't need tumble drying so they use less energy.

What is the hidden technology in your fabrics?

For Autumn/Winter most of our clothing uses ThinHeat ® technology, whereas our socks use IsolWool ®. For Spring/Summer we use CoolFresh ®. All our trousers are made using 3XDRY ®. These technical fabrics are able to do various things, including keeping you warm or cool, fresh all day and thrive on low maintenance. They are proven and safe technologies, subjected to stringent tests, including tests for allergies. 

Are your clothes sustainable? And where are they made?

All our clothing thrive on low maintenance and easycare (wash on low, while no tumble drying is required as they are fast drying). Every garment we make goes through a long and rigorous quality process.

Most of our fabrics are bespoke and made specifically to meet our requirements. They are made in partnership with European Mills where salaries are above minimum wage. The factories we use are in the UK, helping to sustain UK manufacturing and keeping shipping miles to a minimum.