The Rimmel London Lasting Finish 25hr Foundation with Hydration Boost is designed to provide long-lasting coverage and hydration for a comfortable, flawless finish. This foundation is formulated to stay put for up to 25 hours, resisting transfer and fading throughout the day. The "Hydration Boost" aspect indicates that the formula includes moisturizing ingredients to keep the skin feeling hydrated and comfortable, preventing dryness or tightness.