Aspects to Take into Account When Buying Wigs for Women A number of factors determine the cost of a wig. Human hair wigs are among the most expensive, although certain models are made of synthetic materials. Natural human hair lace comb hats are also among the most costly. Although they're generally less expensive but require more attention. The hair will react with humidity as well as the weather , and could need to be changed or dyed for the best appearance. In light of this it is important to consider whether the cost of a natural human hair bob is worth the added expense.