Cotton is a breathable fabric, which allows your body to stay dry, while your skin is still able to ´breathe´. This ensures staying cool, even on warmer days in summer. Or any other situation where you might sweat. Because cotton is able to absorb moisture, your body will stay dry throughout the day and this will help you to feel comfortable and cool too.
Last but not least, the cotton fibers keep the fabric away from your skin. This creates a thin layer of air that not only helps you stay cool in summer, but also helps to keep you warm during colder days. These properties also make the shirt to stay ´fresh´ all day. Most synthetic blends feel roughly the same as cotton in the morning but will get sweaty during the day. They might even start to smell a little bit funky. But with a 100% cotton dress shirt you can be quite sure about have a crisp and fresh shirt throughout the entire day.
Wool is naturally water and dirt resistant, as well as being extremely durable, making it the perfect long-lasting option for a suit. Additionally, wool easily maintains its shape and is also incredibly breathable.
One of the reasons tailors prefer wool as a material to work with is that it retains its shape better than most fabrics.
Wool is woven and has air pockets and gaps throughout that you can’t see. The air pockets trap warmth while the gaps allow air to move through and thus let moisture evaporate.