The product you're describing seems to be a waterproof peel-off tattoo lip liner and lip tint, designed for long-lasting and vibrant lip color. Here's a quick breakdown of the features based on your description:

1. Waterproof: Resistant to water, ensuring the color stays intact even in humid conditions or while swimming.
2. Peel-Off Tattoo Effect: The product can be applied and then peeled off, leaving a stain-like, natural finish on the lips.
3. Long-Lasting: Provides a matte finish that stays for hours without the need for frequent touch-ups.
4. Brown Contour: Suitable for contouring and defining the lips, giving them a fuller appearance.
5. Tear-Off Design: The peel-off method may make application easier and provide a consistent, smudge-free look.