a t-shirt or tee shirt is a kind of shirt which has short sleeves. these sleeves cover the shoulders and the top of the arm, but they do not cover the elbow or the forearm. t-shirts are usually made from cotton fabric or fabric which contains a mix of cotton and polyester. t-shirts are usually considered a casual type of clothing. both men and women wear t-shirts in western countries, such as the united states, canada, england, and france. in some countries, such as muslim countries, women do not wear t-shirts outside of the home.