Wool fibers have a moisture-wicking effect
Wool fibers naturally wick away moisture, preventing this moisture from remaining in the fabric. This keeps the skin dry, but also prevents the formation of mildew, or mold. In addition, wool also has natural antimicrobial properties, as bacteria are generally more likely to be attracted to smooth, positively charged surfaces of synthetic fibers, rather than the scaly, neutrally charged surface of a wool fiber. Hospital studies show that bacterial colonies are common in cotton sheets, but not in wool blankets under the same conditions.
