Wig is a full cap piece that covers from the front around the ears to the back of the wearer’s head. In other words, it covers the entire head. Compared with modern hair systems, wigs are in fact clumsy and very unrealistic in looking. Such low degree of naturalness makes it easy for people to find out that a person is wearing a wig, which indeed push substantial numbers of customers that pursue undetectable appearance away. Wigs are not meant to be worn all day, and it should be taken off when sleeping or showering. Since this kind of single-unit accessory is designed to be worn all the time, it can be easily removable.