La Prairie Advanced Marine Biology Day Cream SPF20 50ml. This lightweight, moisturising cream-gel firms your skin, while offering high-level protection against environmental impact, including harmful sunrays. Its youth-protecting qualities come from marine-derived plant sources with excellent anti-oxidant capabilities, used for the first time in a skin-treatment product. It helps restore the balance of your skin`s natural ecosystem while protecting it against premature ageing. Your skin will take on a youthful radiance from the moment of application.