Factors to Consider When Buying Wigs for Women A variety of variables determine the price of a wig. Human hair wigs are most expensive, although some models are constructed from synthetic materials. Hair lace made from natural hair combs are also the most expensive. While they're often more affordable however, they need more care. They'll react to humidity and the weather and may need to be restyled or re-dyed for the best appearance. Due to these reasons it is important to consider whether the expense of a natural human hair bob is worth the additional cost.