Important Factors to Consider when Purchasing Wigs for Women Many factors influence the cost of the cost of a wig. Human hair wigs are most costly, though some models are made from synthetic materials. The natural human hair combs are also among the most costly. Although they're generally less expensive however, they need more care. The hair will react with humidity as well as the weather , and could need to be styled or dyed to make it look the best. Given these issues, you should consider whether the price of a natural human hair bob is worth the additional cost.