Things to consider when buying Wigs for women Many factors influence the cost of an wig. Human hair wigs are among the most expensive, although some are made of synthetic materials. The natural human hair combs are also among the most costly. Although they're usually less costly but require more attention. They'll react to humidity as well as the weather and might need to be changed or dyed for the best appearance. Given these issues you must consider whether the cost of a natural human hair bob is worth the added expense.