Why exactly does wool reportedly keep you warmer than cotton when wet from sweat or rain?
Wool has several unique properties that make it a better insulator than cotton when wet.
- Absorbs less water: Wool fibers can absorb up to 30% of their weight in water without feeling wet, while cotton can absorb up to 8%. This means that wool retains more of its insulating properties even when it gets damp.
- Traps air: Wool fibers are crimped and have a natural loft, which creates air pockets that trap heat. When wool gets wet, these air pockets remain, providing insulation.
- Wicks moisture: Wool can wick moisture away from the skin, keeping you dry and comfortable. This is especially important when you're sweating or in wet conditions.
In contrast, cotton absorbs water and becomes heavy and cold when wet. It also does not wick moisture away from the skin, which can lead to discomfort and hypothermia.
Conclusion Wool is a better insulator than cotton when wet because it absorbs less water, traps air, and wicks moisture. This makes it a better choice for clothing in cold and wet conditions.
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