Using a gentle formula, the Orchidee Imperiale delivers a luxurious and soft cleanse. It maintains a pH close to that of the skin and leaves the skin perfectly clean, smooth, and revitalized. Design house: Guerlain. Series: Orchidee Imperiale. Category: Beauty and Personal Care. Type: Skin. SubType: Anti Aging Serum. Size: 1.0 oz. Style: GNORCHSRCT1. Guerlain / Orchidee Imperiale Longevity Serum Concentrate 1.0 oz (30 ml).