Nic salts are used in these vape kits because they are designed to provide a smoother throat hit. The nic salt used in these disposable kits mimics the sensation of traditional smoking. Nic salt delivers nicotine to the bloodstream within a short while. It stays in the body for longer periods and provides a pleasant nicotine hit as well. Nic salts offer a smoother inhale and instant satisfaction. It will keep your cravings at bay for longer.