New, unopened 50ml refill. Purchased from the YSL official website in December 2025. The storage case is used. It can be used without the storage case. Retail price including tax: ¥19,140 This is a night-time moisturizing serum, said to lead to skin that looks like you've had a good night's sleep the next morning. It uses a unique two-layer texture to address dullness caused by dryness, and lack of firmness and radiance. To use, at night, after preparing your skin with toner, shake the container well and apply two pumps to the entire face and neck. It can also be used in the morning or during the day, but in that case, be sure to use it with sunscreen products.