One of the reasons gel manis are so popular is how long they last! "The efficacy of a gel is based on how well the product goes on, its durability and how easily it can be removed," says Kallens. Most salons will guarantee no chips for a week, but if applied properly, they can last up to three! Unlike regular polish, which can chip after two to three days (unless you take these steps to make them last longer), they're borderline indestructible, which makes them ideal for weddings, special occasions, and vacations. The question is only whether your health pays a price.