Important Factors to Consider when Purchasing Wigs for women A number of factors determine the price of a wig. Human hair wigs tend to be the most expensive, but certain models are made of synthetic materials. Hair lace made from natural hair comb hats are also among the most costly. While they're often more affordable however, they need more care. Hair bobs react differently to humid conditions and the weather and may need to be styled or dyed for the best appearance. Given these issues you need to think about whether the expense of a natural human hair bob is worth the additional expense.