Factors to Consider When Buying Wigs for women A variety of variables determine the cost of the cost of a wig. Human hair wigs are the most costly, though some are made of synthetic materials. The natural human hair comb hats are also the most expensive. Although they're generally less expensive but require more attention. It's possible that they'll be affected by humidity as well as the weather , and could need to be changed or dyed to look its best. Due to these reasons you must consider whether the cost of a natural human hair bob is worth the extra expense.