Since 1977 Craft have been actively involved in the research and development of ventilation and moisture dispersal properties for different fabrics. The fruit of these efforts is the Craft Principle, a way of providing functional training and competition wear that ensures the best body microclimate (the temperature and moisture conditions closest to the body) for optimal performance. An intensive training session will result in the body producing a considerable amount of sweat. This is just how it should be and a confirmation that you are pushing your limits. If you are not wearing functional clothes, the sweat will remain in place and block the pores, causing your body heat to rise. Eventually the clothes will turn into a damp, cold and heavy envelope, relentlessly hampering your performance. If you are wearing functional clothes, however, the skin will stay dry and you will be able to perform at an ideal working temperature. Craft's functional clothes, in up to three layers, create a perfect microclimate and provide the basis for optimal performance. Each layer is equally important and complements the rest of the chain.