Factors to Consider When Buying Wigs for women A variety of variables determine the cost of a wig. Human hair wigs tend to be the most costly, however some are made of synthetic materials. The natural human hair comb hats are also the most expensive. While they're often more affordable but require more attention. The hair will react with humidity as well as the weather and may need to be dyed or styled for the best appearance. Due to these reasons it is important to consider whether the cost of purchasing a natural human hair bob is worth the additional expense.