Important Factors to Consider when Purchasing Wigs for women A variety of variables determine the cost of an wig. Human hair wigs are most costly, though some are made of synthetic materials. Human hair is naturally laced comb hats are also the most expensive. While they're typically less expensive however, they need more care. Hair bobs react differently to humid conditions and the weather , and could need to be dyed or styled to appear its best. In light of this, you should consider whether the price of a natural human hair bob is worth the additional cost.