The basics Kett Hydro Proof-6ml Trial Pack Collection** contains all 10 shades of this alcohol-based, water-proof foundation in a convenient plastic case.  The benefits Our exclusive airbrush only formula is waterproof, smudgeproof and non-transferable on clothes. Stays on until you take it off.  The uses Created exclusively for airbrush use, this smudge-proof, non-transferable product stays put until removed and is an industry favorite for everything from tattoo coverage to high-endurance action scenes. . The bottom line Hydro Proof sustains exposure to the elements for extended periods of time.