How Does Thermal Underwear Keep You Warm?

Did you know that one of the things keeping you warm in thermal underwear is air?

Tiny pockets of air trapped between the fibres of knitted fabric help retain body heat. But warmth alone is not enough. The material also needs to manage moisture, remain soft and flexible, and feel comfortable beneath other layers of clothing.

Achieving this combination of properties in a lightweight knitted fabric is a demanding technical challenge.

At Global Textile, our specialists are working on knitted fabric for thermal underwear, focusing on how the material should perform when worn close to the body. The aim is to help retain warmth while allowing freedom of movement and avoiding unnecessary bulk.

As colder weather approaches and we reach for warmer jackets and sweaters, our textile technologists are working to make comfort begin with the very first layer of clothing.