Wool insulates, even when wet

The wool fiber core can absorb up to a third of its own weight in moisture. Only when wool is saturated with more than 60% of its own weight in moisture does it also start to feel wet. Therefore, even when quite damp, wool still contains enough air “pockets” to insulate well. In doing so, the moisture wicking properties of the fibers help carry the wetness away from the body and keep it warm.