A dress shirt, button shirt, button-front, button-front shirt, or button-up shirt is a garment with a collar and a full-length opening at the front, which is fastened using buttons or shirt studs. A button-down or button-down shirt is a dress shirt which has a button-down collar – a collar having the ends fastened to the shirt with buttons.
Dress shirts are normally made from woven cloth, and are often accompanied by a jacket, collar sleeve, and tie, for example with a suit or formalwear, but shirts are also worn more casually.
Shirts are made of woven cloth. The natural fibers used in the past were cotton (the most frequent), linen (the oldest), ramie, wool or silk. Nowadays, artificial fibers such as polyester or polyester blends are often used, due to their low cost, despite being considered by most shirtmakers the poorest material, owing to less softness and breathability. However, while high quality cotton shirts can survive with care a few decades, a polyester/cotton blend may be used in more demanding environments. Linen produces a cool fabric that wrinkles heavily, and is mostly used in light summer shirts. Cotton is therefore the standard material for all but the cheapest shirts. Silk is occasionally worn, though it is hot to wear and has a marked sheen.