Button-down shirt, made of more relaxed material than dress shirts. May be short- or long-sleeved. Common indicators of casual shirts are plaid or checkered patterns, short sleeves, more than one pocket, and bold colors and patterns.
T-shirts are short-sleeved casual shirts, generally made of cotton, having the shape of a T when spread out flat. Tank tops are close-fitting sleeveless tops.
Loose, heavy shirts, typically made of cotton, worn when exercising or as leisurewear. Provide an extra layer of warmth.
Form of shirt with a collar, a placket neckline (meaning it is open and closed by overlapping layers of fabric), with two or three buttons, and may or may not have a pocket. Polo shirts are usually short-sleeved but occasionally may have long sleeves.