Aspects to Take into Account When Buying Wigs for Women Many factors influence the cost of hair wigs. Human hair wigs tend to be the most expensive, although some are made of synthetic materials. Human hair is naturally laced combs are also among the most costly. While they're typically less expensive however, they need more care. They'll react to humidity and the weather and might need to be restyled or re-dyed to make it look the best. Because of these factors, you should consider whether the expense of a natural human hair bob is worth the added cost.