Stretch denim that keeps its shape. Doesn’t this sound like a dream? T400® Ecomade, made by Lycra, makes it possible for you to enjoy the comfiest jeans. Lycra is pushing to deliver comfortable stretch with a low environmental impact. But what is T400® Ecomade? And why is it called “eco”?

How is T400® Ecomade made?

The T400® Ecomade fibre is made in an eco-responsible production process. The fibres we use in our jeans are produced in Lycra’s production facilities in the UK and Singapore. T400® fibres are made through melt spinning. A paste is made by heating the different fibres. The paste is then pushed through a spinneret with tiny holes to create a single thread. The T400® technology melt-spins two polymers into a single fibre thread, a special architecture that creates the durable stretch we’re looking for. 

The two polymers' shrinkage ratios are different, which results in a spring effect. It is like a spring that you find in your ballpoint pen, whereas you can think of elastane as an elastic band which stretches out when you pull on it. The T400® technology bounces back stronger!

Once these springlike T400® Ecomade fibres are spun together, they can be blended with other fibres, for example, organic cotton, to make for a comfortable stretch fabric. Et voila, the comfiest jeans are born!