A women T-shirt is a shirtwhich is pulled on over the head. A T-shirt is usually buttonless, collarless, and pocketless, with a round neck and short sleeves. The sleeves of the Tee-shirt extend at least slightly over the shoulder but not completely over the elbow but now a new fashion is on its way that the t-shirts are in long sleeves too. A shirt that is either longer or shorter than this ceases to be a T-shirt. T-shirts are typically made of cotton or polyester fibers (or a mix of the two), knitted together in a jersy stitch that gives a T-shirt its distinctive soft texture. T-shirts can be decorated with text and/or pictures, and are sometimes used to advertise of some companies and garments shops.