Wigs are having a moment. From Vivica Fox, who has her own wig line, to Christina Hendricks and Lady Gaga, famous ladies are now changing up their hairstyles as often as an Oscars host changes outfits. Why? The commitment-free hairpieces are easier to use and more realistic than they once were. "Technology for netting, materials, and machines have changed so they are better than ever," says Edward Tricomi, master stylist and co-founder of the Warren-Tricomi Salons. But as much as the 2.0 versions can help decide if your bang style is on-fleek, the construction of these new hair systems are also ideal for women with medical conditions who just want hair that looks and feels like their own.

Here, experts answer seven essential questions about wigs.

Q: What Are They Actually Made Out of?

There are two kinds of wigs: Human hair and synthetic hair. The natural hair is mainly sourced from India or Asia and costs significantly more than the faux version. But if you're looking for something more affordable, opt for a synthetic wig that's heat resistant, says Andrew DiSimone, wig expert and salon owner at HairPlace NYC. That’s because if you're cooking or open the oven door, the gust of heat could damage synthetic hair that’s not heat-resistant, he cautions. Synthetic hair is also best for cuts that fall above your shoulders, like a bob, since the lengthier options can start to wear and fray if the man-made fibers rub against your shoulders.

Q: What Types of Wigs Are Available?

The updated forms come in all lengths, styles, and colors and even in individual pieces. "I always tell every woman to have a winglet or a pony tail in her purse," says Tricomi. "You can use it to make a more full chignon, add volume, or give the appearance of longer hair."

Q: Who Can Benefit from Wearing a Wig?

Anyone, but for those experiencing medical hair loss, these hairpieces can be a saving grace. DiSimone, who has clients with alopecia and genetic hair loss or who are going through chemotherapy, explains that his salon sells wigs so real you can put them in pigtails and still have the part look natural.

DJ Quintero, a celebrity stylist who styled Katie Holmes' wig for the Met Gala, also points out that wigs can be used to simply try a new look. "I think wearing a wig is a fun way to completely change your appearance without actually changing your appearance," he says, adding that it's a safe way to be daring.

Q: What Should You Know Before Buying a Wig?

Do your homework. Would you try a new restaurant before checking Yelp? Probably not—and the same goes for scanning reviews as you search for reputable wig retailers in your area. Also, ask about the return policy.