Fleece does keep you warm when wet. Unlike cotton, which becomes cold and heavy when wet, fleece retains its insulating properties even when it gets wet. This is because fleece is made from synthetic materials, such as polyester, which have hydrophobic properties. This means that they repel water and do not absorb moisture like cotton does.
When you wear fleece in wet conditions, the water beads up and rolls off the fabric rather than being absorbed into it. This helps to keep you dry and comfortable. Additionally, the structure of fleece allows for air pockets to form between the fibers, which helps to trap body heat and keep you warm.
In contrast, cotton absorbs and holds onto moisture, which can make you feel chilled and uncomfortable. When cotton gets wet, it loses its ability to insulate and can actually draw heat away from your body. This is why cotton clothing is not recommended for outdoor activities or for cold and wet conditions.
I have personally experienced the difference between wearing cotton and fleece in wet weather. On a hiking trip, I wore a cotton sweatshirt and my friend wore a fleece jacket. As we encountered rain along the trail, I quickly felt cold and damp, while my friend remained warm and dry in her fleece. It was quite clear that fleece was a much better choice for staying warm in wet conditions.
Furthermore, fleece has the ability to wick perspiration away from your skin, keeping you dry and comfortable during physical activities. When you sweat, the moisture is pulled away from your body and dispersed across the fabric, allowing it to evaporate more easily. This helps to regulate your body temperature and prevent overheating.
Another advantage of fleece is its water-resistant properties. While it is not completely waterproof, fleece is more resistant to water than cotton. This means that it can provide some protection against light rain or snowfall. However, in heavy downpours or prolonged exposure to water, fleece will eventually become saturated and lose its insulating properties. In such situations, a waterproof or water-resistant outer layer is recommended.
To summarize, fleece is a superior choice for staying warm and dry in wet conditions compared to cotton. Its hydrophobic properties, ability to retain warmth when wet, and moisture-wicking capabilities make it a highly functional and practical fabric for outdoor activities and cold weather. Whether you are hiking, skiing, or simply braving the elements, opting for fleece over cotton can greatly enhance your comfort and insulation.