Factors to Consider When Buying Wigs for Women Many factors influence the price of the cost of a wig. Human hair wigs are the most costly, though some are made of synthetic materials. Human hair is naturally laced combs are also the most expensive. Although they're usually less costly, they require more maintenance. Hair bobs react differently to humid conditions and the weather , and could need to be restyled or re-dyed for the best appearance. Given these issues it is important to consider whether the expense of a natural human hair bob is worth the extra expense.