Sports shirts (American English), otherwise known as cheer-shirt, is a short-sleeved shirt with a closed collar and usually only short sleeves. Sports shirts are commonly made from cotton and polyester, while other synthetic fibers are also used sometimes. They are commonly worn by both men and women as formal attire in many sports leagues around the world. Some companies produce customized sports shirts for customers who want a certain design or material on their shirts.
Although synthetic materials are widely used to make sports shirts, not all of these fabrics are safe or appropriate for use as athletic uniforms. The main concern is whether or not these synthetic materials will interfere with the comfort of the wearer. If a player sweats while playing a sport, this can be very uncomfortable, especially if the sweat gets into the uniform. Therefore, most synthetic materials are not recommended for use as uniforms.
A sports jacket, on the other hand, serves the same purpose as a sports shirt, except it is worn over a shirt. In some countries, it is compulsory for players to wear a sports jacket, which is attached to their uniform by a zipper. However, a sports jacket is different from a sports shirt because it is not made of a synthetic material but of a heavy duty leather. Jackets are generally made in two pieces (neckline and sleeves) and most commonly with one zipper pocket.