What is a "polo-neck collar"?

A polo-neck collar, also known as a turtleneck, is a type of collar typically found on a shirt or sweater that extends up to the wearer's neck and folds over to create a layered effect. The collar is designed to provide warmth and comfort around the neck, making it a popular choice for cooler weather. It is commonly made of knit or woven fabric and can come in a variety of colors and styles, including slim-fitting or loose-fitting options. The polo-neck collar can be worn alone as a fashion statement or as a layering piece under jackets or coats. It has become a classic and versatile piece of clothing that can be dressed up or down depending on the occasion.