What is a sock with no heels?

A sock with no heels is typically referred to as a "tube sock" or "no-show sock." These socks have a cylindrical shape without a defined heel section, allowing them to fit a range of foot sizes. They are often used for activities like sports or casual wear, providing comfort and flexibility without the constraints of traditional socks. Additionally, they can be more versatile for wear with different types of footwear.