The wig is becoming more and more common in recent years. Technological advances are so incredible that it is difficult to determine the difference between a high quality synthetic wig and a human hair wig. The cap construction is the basic material of the wig. It is attached to the hair in order to create the wig. The cap structure is lighter, more durable and looks more natural. It is important to consider the cap structure when choosing a wig. Each cap construction has its own specific method to attach the wig and its own set of advantage.