Important Factors to Consider when Purchasing Wigs for Women Many factors influence the price of a wig. Human hair wigs tend to be the most costly, though some are made of synthetic materials. Human hair is naturally laced combs are also among the most costly. While they're often more affordable but require more attention. They'll react to humidity and weather and may need to be dyed or styled to appear its best. Given these issues you must consider whether the expense of a natural human hair bob is worth the extra cost.