Factors to Consider When Buying Wigs for women Many factors influence the price of a wig. Human hair wigs are most expensive, although some models are made from synthetic materials. Hair lace made from natural hair combs are also among the most costly. Although they're generally less expensive however, they need more care. The hair will react with humidity and weather , and could need to be restyled or re-dyed to look its best. Given these issues it is important to consider whether the price of a natural human hair bob is worth the additional expense.