Plastic wrap is unnecessary. As for the essential oil, the real plant essential oil can achieve this effect, but it is difficult to guarantee the purity of the essential oil in beauty salons, because the real pure essential oils is more expensive. If you don't know anything about it, it is difficult to tell the good from the bad, the true from the false. Because the real plant essential oil is a small molecule, it can penetrate quickly without wrapping plastic wrap, so the real essential oil is absorbed by massage when it is used, so I don't think you need to accept the promotion of beauty salons, you can buy good quality essential oil yourself.