You'll find a tube of Weleda Skin Food (£12.50) in every makeup artist's kit. It has an incredible thick formula, which deeply hydrates dry skin; acting almost as a protective layer. It's super versatile and can be used as a hydrating mask, applied to the hands and body, used to spot-treat areas that need extra TLC, and also mixed with lighter creams and applied all over your face. To us, Skin Food is a makeup bag must-have.