If it has taken on water, it sheds it like a dog, drains it out and soon regains its insulation. We use a highly durable water-repellent treatment for fabrics, Nikwax TX.10i Elastomer. Any, water-repellency can be damaged by contamination with dirt, or detergent. The Pull Factor with Wicking Wicking is the opposite of water-repellency. Wicking surfaces draw water into them.
Trees draw water to great heights by wicking, assisted by evaporation of water from the leaves.
Wicking is therefore a very powerful way of directing water. Parameta S is a highly water-absorbent, wicking fabric. If you put water on the furry side, it is pulled through to the smooth face. Parameta S allows you to choose which face of the fabric you want next to you. Wear the smooth side next to the skin.