The yarns, until the transformation in tissue, must balance their own moisture and that contained in the surrounding air. A lack of moisture in the air is unpleasantly noticeable. Non air-conditioned factories or with a different humidification system production difficulties during embroidery, weaving and spinning yarns due to breakage and high static electricity levels. The American Institute of Textile Technology found that wool, by increasing relative humidity from 60 to 70% during storage and processing, shows a 15% increase... of its elasticity, which drastically reduces breakage during processing. Adjusting humidity levels with a misting system increases the tensile strength of all natural fibers, removes static electricity improving the workability of the yarns and fibers, controls the suspended residual and improves comfort of work areas.