A sock is an item of clothing worn on the feet.
The foot is among the heaviest producers of sweat in the body, as it is able to produce over 1 US pint (0.47 l) of perspiration per day.
Socks help to absorb this sweat and draw it to areas where air can evaporate the perspiration.
In cold environments, socks decrease the risk of frostbite.
Formal attire traditionally requires long / dress socks (to prevent any flashes of visible skin, and because they’re less prone to bunching/falling).
Socks should be made of wool, not cotton, because wool is effective at wicking and cotton is less so. Wool is also more durable. Blends can be helpful to add specific properties.
SmartWool is a brand of merino wool treated with a few of the “washable wool” processes which prevents shrinkage. Regular wool socks should be hang-dried.