We constantly review our materials choices based on performance and sustainability. Both natural and synthetic fibres have positives and negatives. Synthetic fibres are extremely versatile and fit for purpose – they are hardwearing and great for longevity but can be part of the issue at end-of-life. Some natural fibres have excellent technical properties, such as merino wool.  Merino is naturally biodegradable and can be recycled so it is easier to dispose of once a garment is no longer in use.  But wool (all wool, not just merino) must be carefully sourced to avoid mistreatment of animals and a lot of land is needed to raise the sheep.  Added to that, merino is such a fine fibre that it tends to wear quickly.  Our guiding principles on sustainability in fabric choices are based on the premise of using recycled synthetic fibres in our technical wear, with the highest performance qualities and durability.  We continue to investigate natural fibres that may have an application in our garments.