With technological advances
Synthetic hair has come a long way in recent years. In some cases it is difficult to tell the difference - the density and texture are such that they feel almost like human hair. As a matter of fact, with some of the higher quality synthetic pieces, you would never know they were not natural human hair if you didn’t have the human hair right next to it to compare. The most appealing aspect to synthetic hair is it can often be worn right out of the box with little or no styling. The fiber has "memory" for wave, curl and volume which lets hair bounce back into place with minimal effort - the curl pattern is permanently set. It can even hold up in bad weather and can guarantee no drooping or frizzing.