Hydrate, hydrate, hydrate! Or so goes the mantra when it comes to taking care of our skin. The skin is our body's largest organ, and as such, deserves our undivided attention when it comes to proper care. Our skin protects our bodies from the elements and is susceptible to potentially damaging factors such as weather, water and pollutants in the environment. Remember, moisturizers do their job best when applied to clean skin that is periodically exfoliated to remove dead skin cells. Body moisturizers can be classified in two groups: humectants, which draw water from inner layers toward the surface of the skin, and occlusives, which block water from evaporating from skin cells.