Aspects to Take into Account When Buying Wigs for Women A variety of variables determine the cost of the cost of a wig. Human hair wigs are the most expensive, although some models are constructed from synthetic materials. The natural human hair combs are also the most expensive. While they're typically less expensive however, they need more care. The hair will react with humidity and conditions and could require to be styled or dyed 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 expense.