The thinnest, softest, waterproof gel liner encapsulated in a 1.5MM mechanical pencil for precision accuracy and ease of application. No pot, no brush, no clean-up required. Two clicks and one stroke create dramatic definition that resists transfer for extended wear. The unique formula, poured into a slim mechanical component, has the malleability, intensity and staying power of a traditional gel liner. The waterproof, transfer-proof and long-lasting formula delivers extended wear. The precision 1.5MM tip ensures effortless control and allows for tightlining in between lashes. Each advanced mechanical pencil lasts for approximately 17 to 20 uses. Ophthalmologist tested. Vegan & cruelty-free. Hourglass developed this formula to prime skin and create the perfect canvas for the Ambient Lighting Collection. The first-of-its-kind formula was developed to create the thinnest layer of light-enhancing particles, which allows for layering without re-emulsifying the layer underneath. This results in the most weightless lighting effect on the skin. This breakthrough primer creates the ideal base for light diffusion and refraction while also prepping the skin for makeup application.