Important Factors to Consider when Purchasing Wigs for Women A variety of variables determine the price of an wig. Human hair wigs are the most expensive, but certain models are made of synthetic materials. Hair lace made from natural hair combs are also among the most costly. While they're often more affordable, they require more maintenance. It's possible that they'll be affected by humidity and weather and might need to be dyed or styled to look its best. Given these issues you need to think about whether the cost of a natural human hair bob is worth the additional expense.