Aspects to Take into Account When Buying Wigs for women A number of factors determine the cost of a wig. Human hair wigs tend to be the most costly, however some models are constructed from synthetic materials. Natural human hair lace combs are also the most expensive. Although they're usually less costly however, they need more care. The hair will react with humidity and the weather and might need to be restyled or re-dyed to make it look the best. In light of this, you should consider whether the price of a natural human hair bob is worth the added cost.