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Has the characteristics of resistance to insects and mildew Wool fibers retain 40% of moisture at 65% relative humidity, and retain 45% of moisture at 100% relative humidity. Once the moisture retained in the wool fiber exceeds 33%, a tidal sensation occurs, and there is a tendency to produce microorganisms and odors. If the ventilation is not good, mildew will occur. Because wool fibers are protein fibers on animals, they are susceptible to insects.
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