What is a "skivvy"?

A skivvy is a type of close-fitting undershirt typically made from cotton or synthetic fabric. It usually has a round or V-shaped neckline and short or long sleeves. Originally designed for sailors and soldiers, skivvies are now commonly worn as an undergarment or a basic layering piece. They are often used as a base layer to provide additional warmth during cold weather or as a moisture-wicking layer during physical activity. Skivvies are available in various styles and colors for both men and women.