Important Factors to Consider when Purchasing Wigs for Women A number of factors determine the price of an wig. Human hair wigs are among the most costly, however some are made of synthetic materials. Natural human hair lace combs are also the most expensive. Although they're generally less expensive, they require more maintenance. It's possible that they'll be affected by humidity and the weather and may need to be dyed or styled to appear its best. In light of this you must consider whether the expense of a natural human hair bob is worth the added expense.