Our skin is exposed to varous elements whether it be the cold, dry air in the Northern Tundra biome or the moist, humid climate in the Southern Tropical biome. Fortify your skin from UV stress, photodamage and environmental aggressors with this multi-complex serum rich in Argan and Alpine Rose stem cell extracts . Tundra + Tropical is also rich in Ferulic acid and L-arginine to repair damaged.