Linen is traditionally used for summer clothing but mixed with wool, cashmere or silk it can also be used for winter wear. Flax is environmentally friendly, requiring fewer fertilizers and pesticides than cotton. The processing of flax into yarn is carried out with regard for the environment. Research is constantly in progress to reduce pollution from textile processing. Linen has many textile end-uses and all its by-products are used for other purposes. Linen is comfortable, non-allergenic and durable. A new addition to the market, knitted fabric in 100％ linen, has the advantage of not creasing.