It is a little-known secret, outside of the performance apparel and recreational sports industry, that overheated, sweaty feet are rather easy to deal with, and all anyone really has to do is apply moisture-wicking, quick-drying fabric to socks and you're ready to go.
The best socks that keep feet dry are made of fabric that speeds moisture away from the skin and dries quickly, which regulates temperature, regardless of whether it's hot or cold outside. This means they'll warm you in winter, and cool you in summer, and you'll be comfortable either way.
They'll go even further than that by eliminating the growth of any odor-causing bacteria, which means that after a long day of hiking, biking, jogging, or wearing stuffy dress shoes, they'll smell almost pristine. Sound good so far?
It is. Backpackers, hikers, and other outdoorsy types have been using high-performance socks for decades, whether made from synthetic or natural materials, which provide the all-day comfort that seriously intense climbs require. Performance socks now come in all sorts of shapes, sizes, thicknesses, colors, styles, and other details, so no matter what sort of endeavor you are undertaking (even if it's just lounging around the house), you'll be much happier with comfy feet.
Cotton, by comparison, soaks up moisture and stays wet throughout the day, gradually accumulating until you can barely stand it. Performance fabrics, on the other hand, will feel just somewhat damp after a long day, and will dry out in a matter of minutes, not hours. Oh, and they're softer than cotton, last much longer, usually have seamless toes, and are machine washable. Plus, they're usually more environmentally friendly.