There are a number of environmental triggers that can cause sensitivity in skin, including oxidative stress caused by free radicals, climate change, pollution, smoke, smog, sun exposure, friction or just product overload. Even those whose skin is usually calm throughout the rest of the year can experience sensitive skin during the dryer, harsher winter months. The SOOTHE Regimen helps to reduce dryness and cracked or chapped skin for a calm, healthy-looking complexion every day.