Which product would be least suitable for dry, mature skin with fine vertical lines around the lips?

The least suitable product for dry, mature skin with fine vertical lines around the lips is a matte lipstick. This formulation tends to be drying and can accentuate the appearance of fine lines and dryness.

Matte lipsticks are typically created with a higher concentration of pigment and less moisture, which can lead to a flat, sometimes crumbly finish on the lips. On skin that is dry or has fine lines, this type of lipstick can settle into those lines, making them more noticeable and potentially leading to a less attractive, aging appearance.

In contrast, products like creme lipstick, lip gloss, and sheer lipstick are generally more hydrating and may contain nourishing ingredients that can help to smooth the appearance of fine lines. They tend to provide a more luminous finish that can help to create the illusion of fuller, more youthful lips, making them better choices for individuals with dry, mature skin.