A Henley shirt is a type of casual top characterized by its round neckline and a placket with a few buttons. Typically made from cotton or a cotton blend, it offers a comfortable fit and is often worn as a layering piece. The shirt can come in various styles, including short-sleeved and long-sleeved versions. Originally designed as undergarments for men in the 19th century, Henley shirts have evolved into popular everyday wear for both genders. They are versatile and can be paired with jeans, shorts, or even layered under jackets, making them a staple in many wardrobes.