The turtleneck is believed to have originated as a form of functional neck protection by fishermen and sailors in Northern Europe during the middle Ages. The high collar provided extra warmth and protection against harsh weather conditions on the water. Over time, turtlenecks gained popularity as practical undergarments worn by both men and women, serving as a base layer for added warmth in colder climates. Eventually, turtlenecks evolved into versatile pieces of clothing used for their aesthetics and practicality, becoming staple items in fashion and various aspects of culture.