As the weather gets cooler, your skin gets dryer. It's important to keep your skin well nourished in the cold with moisturizers and serums that are especially formulated to protect your skin. "Depending on where you live, winter can be really harsh on your skin," says Beauty Expert Sabrina Bedrani. "I usually use a thicker moisturizer especially at night, while the skin is resting and not in contact of cold and wind-but because heat can also dehydrate and dry out your skin. I like to do a mask twice a week."