Please note: This item requires a compatible Clinique iD Base to use. A revolution in skincare technology; the Clinique iD is a two part treatment that allows you to combine this cartridge with a compatible Clinique iD base, creating a treatment tailored to your skin's needs. Custom-Blend Chemistry Technology ensures that the active ingredients of both the base and the cartridge are delivered to the skin with every pump. Ingredient potency is maintained. The Active Cartridge Concentrate for Lines & Wrinkles features a formula with whey protein which works to reduce the appearance of wrinkles whilst smoothing fine lines and helping to plump up the skin. To use: Insert cartridge into a Clinique iD base making sure the cartridge is held firmly in place. Apply mornings and/or evenings to the cleansed face.