Important Factors to Consider when Purchasing Wigs for Women A number of factors determine the cost of a wig. Human hair wigs are among the most expensive, but some models are made from synthetic materials. Human hair is naturally laced comb hats are also the most expensive. Although they're generally less expensive but require more attention. They'll react to humidity and the weather and may need to be restyled or re-dyed to make it look the best. Due to these reasons, you should consider whether the cost of a natural human hair Bob is worth the expense.