Lipid-free (also known as soap-free) cleansers are liquid skin cleansing products for people with excessively dry skin. They work well for removing cosmetics or for light skin care, and they leave behind an invisible layer of film that helps keep the skin moisturized. However, because they lack any sort of substantial antibacterial component, lipid-free cleansers are relatively ineffective at removing odors, especially around areas such as the armpits and groin [source: Alam et al.].
Perhaps the most unique aspect of lipid-free cleansers is that many of them don't even need to be washed off. The skin cleansing agent is applied to the face or body, rubbed into a lather and then wiped away -- no water needed. This is great for people with certain dermatological disorders, such as dermatitis, whose skin doesn't react well to soap and water [source: WebMD].