Factors to Consider When Buying Wigs for Women A number of factors determine the cost of the cost of a wig. Human hair wigs are the most costly, however certain models are made of synthetic materials. Human hair is naturally laced comb hats 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 conditions and could require to be styled or dyed to make it look the best. Given these issues it is important to consider whether the cost of purchasing a natural human hair bob is worth the added cost.