It can be said that these days, very few things are original. Everything else is copied or imitated, recycled, adapted, revised, or reinvented based on something that came before. Today, there are so many forms and styles of clothing being sold in the market. With so many designs already out, it may be hard to come up with original and never-before-seen clothing designs. Because of this, the function of a piece of garment may also change.

Present designs of clothing may have evolved from previous ones that may still or may not anymore be in style. Take the hooded jacket as an example. Probably the first historical instance of the use of hooded garments was way back during the Medieval Period, when monks wore long robes with hoods. The modern hooded jacket was produced sometime n the 1930s.

Hooded jackets, also known as hoodies, are typically long-sleeved since they are usually used as protection from cold weather. However, as fashion changes and evolves, new forms of hoodies emerge in the market. Today, hoodies are not necessarily used for cold climates. Hooded jackets with short sleeves have also become quite popular. Sleeveless hoodies, which are like vests with hoods, are also considered to be trendy.

Mock turtlenecks are also examples of modified clothing design. Mock turtlenecks only have one layer of fabric for the collar, while typical turtlenecks have a folded double layer of fabric for the collar. Short sleeve mock turtleneck tops are quite the fad these days.

Turtlenecks were used by blue-collar workers as work clothes at the start of the 20th century. As time passed, turtlenecks were accepted as casual wear. There are some people, however, that feel uncomfortable with the thick turtleneck collar. The mock turtleneck, with its thinner collar, is a good alternative for those people. Long-sleeved turtlenecks are also used as winter clothes, but with short sleeve mock turtleneck shirts, the turtleneck-look could be worn during any season without feeling discomfort.

Referee tops have also become part of the casual wear ensemble these days, and different variants are even being sold. Referee shirts in the market may have different neckline shapes, as opposed to the usual necklines on the shirts used by actual sports referees. For the women, referee tops are also available in sleeveless variations. The clothes originally worn by sports officials have become part of the mainstream.