Linen is known for being the oldest natural fibre still in use today made from the stalks of the flax plant Linum. Linen is highly breathable, soft and a natural insulator. It's fibres are hollow, moving air and moisture naturally. It is valued for its ability to keep cool in the summer months and trap warmth in colder weather. This is all achieved through the natural properties of the fibre itself. The production of linen requires less water and fares better in terms of water toxicity. As a result, overall, the environmental impact of the linen (flax) garment is considered to be much lower than that of the cotton garment.