First time in history it worked out to woof organic cotton and tencel fibres in to a super lightweight and durable material. Tencel is made of beech- and eucalyptus-fibres. The trees as well as the cellulose for the fibre production are coming from sustainable plantations which are certificated by the Forest Stewardess Council (FSC). They are offering a real alternative to organic cotton fibres. With a coat of wax the jacket becomes even more water-repellent and more resilient for any outdoor activity.